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My AC compressor clutch will not engage. When i turn on the…

Customer Question
My AC compressor clutch...

My AC compressor clutch will not engage. When i turn on the AC button both fans go off and the motor loads up slightly.

Mechanic's Assistant: Has the clutch been slipping? Are you having any trouble shifting?

2000 Honda Accord EX 4 cyl

Mechanic's Assistant: Are you fixing your Accord yourself? What have you tried so far?

Its the AC clutch on the compressor

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I had a shop change out the compressor and he couldn't figure it out. He said to take it to the dealer to run a scan on the computer. He could jump the relay to make it come on.

Submitted: 2 months ago.Category: Honda
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Answered in 1 hour by:
3/30/2018
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago
Dan
Dan, ASE Master Technician
Category: Honda
Satisfied Customers: 2,061
Experience: Dealer Auto Technician. ASE Master Certified, 15 years of experience
Verified

Hello my name is***** am a Master Technician and I am glad to help you. I am reviewing your question now, and will reply shortly.

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Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Jumping the relay tells me that the wiring and the compressor clutch are both ok. Check the AC fuse under the hood.

Your refrigerant system could be low on charge, that would cause this problem. That could be due to a leak in the system. AC dye is added to the compressor oil and a UV light is used to find the leak. You could also have a faulty low or high pressure switch. A faulty pressure switch could cause your issue as well. You could try jumping the switches to see if the compressor kicks on. That would verify the problem.

Please let me know if you have any more questions.
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Customer reply replied 2 months ago
We jumped the high pressure switch and it did not come on. When it was in the shop they charged it up fully while they had the clutch working. No leaks. Bearing in clutch went out to cause us to replace the compressor to begin with.
Customer reply replied 2 months ago
It blows cold when clutch is engaged. Is both fans supposed to go off when ac is initiated? Every where I read they are supposed to come on when ac us turned on.
Customer reply replied 2 months ago
The only way we can get it on is to jump it from the compressor to the battery.
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Try removing the relay and jumping to verify the wiring is good from the relay to the compressor.

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Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Fans are supposed to be on when AC is on.

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Customer reply replied 2 months ago
How do you do that?
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Turn ac on, with engine running. Remove and install AC relay. Do you hear it click?

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Customer reply replied 2 months ago
Will try that. We’ve swapped the fan relay and the clutch relay.
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Do you have a test light?

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Customer reply replied 2 months ago
multi meter
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Remove relay, turn ac on, check for power at the 4 pins with the relay removed. You should have voltage at 2 of the 4 pins.

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Customer reply replied 2 months ago
Ok will check that too
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Have you checked the AC fuse?

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Customer reply replied 2 months ago
checked all fuses. Just baffles me why the fans are running and when ac is turned in the fans stop
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Is the engine at operating temp when the fans are on?

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Customer reply replied 2 months ago
I think so will check that tomorrow too
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

ok

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Customer reply replied 2 months ago
With engine running at operating temp with relay removed we have power on two legs. With ac off there is power on three of those legs.
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

Does the relay click when installing?

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Customer reply replied 2 months ago
No
Customer reply replied 2 months ago
There r three identical relays we have swapped them all around and nothing clicks.
Mechanic for Honda: Dan, ASE Master Technician replied 2 months ago

I am going to open this up to other experts.

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Customer reply replied 2 months ago
Awesome maybe somebody knows what’s going on.
Mechanic for Honda: eric remington,
 replied 2 months ago
eric remington
Category: Honda
Satisfied Customers: 709
Experience: mechanic/service advisor at topline auto
Verified

I DO..... IF COMPRESSOR CLUTCH DOES NOT ENGAGE DO YOU KNOW HOW TO CK IT FOR POWER AND GROUND?

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Customer reply replied 2 months ago
did that
Mechanic for Honda: eric remington,
 replied 2 months ago

COMPRESSOR CLUTCH NOT ENGAGING? YOU TESTED CIRCUIT FOR POWER AND GROUND WHERE? HOW? WHAT WAS RESULTS? PLEASE ANSWER EACH QUESTION

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Customer reply replied 2 months ago
Not engaging. In the plug in on the compressor by jumping the pos to the battery. The clutch engaged and ac worked well.
Mechanic for Honda: eric remington,
 replied 2 months ago

O​K SO YOU ARE NOT RECEIVING POWER TO COMPRESSOR CLUTCH, GROUND IS GOOD AND AC SYSTEM WORKS, INCLUDING FANS? WHEN COMPRESSOR ENGAGES BY JUMPING? WHAT ARE PRESSURES? WHEN YOU SAY AC WORKED WELL...DOES THAT MEAN THAT GAUGE READINGS WERE 30 ON LOW SIDE 175 HIGH SIDE BOTH FANS CAME ON RADIATOR AND CONDENSER AND THAT VENT TEMPERATURES WERE AT LEAST 40 DEGREES?

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Mechanic for Honda: eric remington,
 replied 2 months ago

I​ KNOW IM SOUNDING PICKY BUT COMPRESSOR WIL NOT KICK ON IF PRESSURE ARE EVEN MARGINALLY LOW SO I HAVE TO PROBE U. DONT MEAN TO BE INSULTING DEMEANING BUT IN ORDER TO DIAGNOSE I NEED CRYSTAL ACCURATE INFO

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Mechanic for Honda: eric remington,
 replied 2 months ago

THE SYSTEM IS DESIGNED TO TURN OFF COMPRESSOR AT EVEN MARGINALLY LOW PRESSURES SO THAT COMPRESSOR DOES NOT GET DESTROYED THRU A LACK OF LUBRICATION

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Mechanic for Honda: eric remington,
 replied 2 months ago

DO YOU HAVE ANY GAUGE OR GAUGES

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Mechanic for Honda: eric remington,
 replied 2 months ago

I MEAN IF LOW SUCTION HOSE IS ICE COLD AND BOTH FANS ARE ON THEN OK MORE THAN LIKELY YOU HAVE ENOUGH FREON IN SYSTEM....LET ME KNOW

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Customer reply replied 2 months ago
Didn’t have the gauges on the ac. When I say worked good I mean blows super cold air. I understand what you’re doing. If you read the previous posts. The shop the put the compressor on jumped it and charged it up. Because the clutch would not work. To rule out the compressor being bad. They checked it all out and now we are doing the same thing. The shop says that it’s a computer problem not telling the elays to kick on. Is there a way to check that?
Customer reply replied 2 months ago
We do have guages
Customer reply replied 2 months ago
But when the shop had the guages on charging it up don’t you think if it would have been low they would have known?
Mechanic for Honda: eric remington,
 replied 2 months ago

I ALWAYS ASSUME EVERYONE IS AN IDIOT CAUSE 1. IM NOT THERE AND 2 I DONT KNOW IF IM GETTING ACCURATE INFO...IVE BEEN TOLD B4 OH I GUESS THEY DIDNTO DO THAT. OK WELL IF YOU YOURSELF FELT IT GETTING SUPER COLD AND FANS CAME ON THEN IT PROBABLY HAS ENOUGH FREON....

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Customer reply replied 2 months ago
When we jumped it to make the compressor come on I felt the cold air. The thing that has me baffled is that when you power up the ac from inside the clutch does not engage but it turns both fans off immediately.
Mechanic for Honda: eric remington,
 replied 2 months ago

THE ONLY WAY TO CK IT IS WITH A SCHEMATIC....ARE YOU WILLING TO PERFORM TESTING AT MY LEAD? THEN 1. WE NEED VIN NUMBER SO THAT I CAN GET FACTORY SCHEMATIC AND DATA 2 WE WILL NEED TO PERFORM TESTING BOTH TEXTING AND PHONE CALL 3. PHONE CALLWILL COVER 2 HOURS WORTH OF TIME. THE PLAN WOULD BE TO TRACE WIRING FROM COMPRESSOR BACK TO SWITCH AND EVERYTHING IN BETWEEN AS NECESSARY

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Customer reply replied 2 months ago
Ok driving now.
Mechanic for Honda: eric remington,
 replied 2 months ago

NO RUSH

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Customer reply replied 2 months ago
55357;���
Mechanic for Honda: eric remington,
 replied 2 months ago

QUESTIONS? LET ME KNOW

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Customer reply replied 2 months ago
No it was a thumbs up.
Mechanic for Honda: eric remington,
 replied 2 months ago

K

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Customer reply replied 2 months ago
WE still have not figured out this issue. It is hot and I have no air. Still trying to find out why it's not cooling.
Mechanic for Honda: eric remington,
 replied 2 months ago

ok so you have everything under control?

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Customer reply replied 2 months ago
No not really. Did you say you needed the vin #? 1HGCG5665YA158343
Customer reply replied 2 months ago
Guess we are taking it to the dealer tomorrow
Mechanic for Honda: eric remington,
 replied 2 months ago

it could be a switch or wiring issue or relay..probably a switch...

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Customer reply replied 2 months ago
All test passed on pressure switch. Changed the relay. Can’t find a wiring issue that’s why it’s going to the dealer in the morning.
Customer reply replied 2 months ago
Thinking it’s in the computer.
Mechanic for Honda: eric remington,
 replied 2 months ago

the fact that idle goes up when you hit switch means that the main switch is ok. but other switches exist...they need to be tested..it wasn't a relay cause you tried that..wiring issues are rare...tracing down wiring not for everyone I guess...computer is receiving signal so it idles up computer issues on these cars rare but possible..which switch low? high? did you try?

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Mechanic for Honda: eric remington,
 replied 2 months ago

I​f you had schematic you could isolate it better or I could help too

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Customer reply replied 2 months ago
On the condenser.
Customer reply replied 2 months ago
Accumulator whatever
Mechanic for Honda: eric remington,
 replied 2 months ago

high pressure...you want low pressure switch location...provide vin and I can find

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Customer reply replied 2 months ago
It’s fustrat that it was working and a new compressor was put on and now it doesn’t work.
Customer reply replied 2 months ago
I did provide the vin
Mechanic for Honda: eric remington,
 replied 2 months ago

so prior to this you ahd compressor clutch engagement? maybe a bent pin bad connection.

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Customer reply replied 2 months ago
The clutch won’t engage
Mechanic for Honda: eric remington,
 replied 2 months ago

a bent pin at the accumaltor did they touch any switches retrace their work perhaps something overlooked

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Customer reply replied 2 months ago
Pins are fine on the accumulator and the circuit is closed on the switch
Mechanic for Honda: eric remington,
 replied 2 months ago

so why did compressor get replaced? how do we know there isn't a blown fuse

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Customer reply replied 2 months ago
The bearing in the clutch were going out. Making a loud roaring noise b
Mechanic for Honda: eric remington,
 replied 2 months ago

were you able to get a good connection(AT THE SWITCH) when you bypassed the switch in order to test it?

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Mechanic for Honda: eric remington,
 replied 2 months ago

BUT PREVIOUSLY CLUTCH DID ENGAGE?

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Customer reply replied 2 months ago
The compresor?yes was able to finish charging the ac lines with the compressor jumped. Yes worked prior to changing.
Mechanic for Honda: eric remington,
 replied 2 months ago

every fuse in every fuse box needs to be checked with a test lite, both sides of fuse, in every fuse box some of these vehciles have 3 fuse boxes and a fuse that you assume doesn't play a role does..I know

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Customer reply replied 2 months ago
We checked all fuses. We have three on this vehicle
Mechanic for Honda: eric remington,
 replied 2 months ago

b4 compressor replacement, did compressor clutch engage?

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Customer reply replied 2 months ago
it did
Mechanic for Honda: eric remington,
 replied 2 months ago

you checked them with a test lite or did you look at them

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Customer reply replied 2 months ago
Checked them with a multi meter
Mechanic for Honda: eric remington,
 replied 2 months ago

what switches were removed during compressor replacement

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Mechanic for Honda: eric remington,
 replied 2 months ago

what switches were removed during compressor replacement

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Customer reply replied 2 months ago
Idk it was done at a repair shop I’m assuming just the compressor. I don’t know that for sure though.
Mechanic for Honda: eric remington,
 replied 2 months ago

so just compressor and evacuate recharge no accumalator

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Customer reply replied 2 months ago
Nope
Mechanic for Honda: eric remington,
 replied 2 months ago

well good luck then...it could be a computer but that's rare and it was working b4...not impossible...could be a fuse box....

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Customer reply replied 2 months ago
Thanks I’ll let you know the outcome.
Mechanic for Honda: eric remington,
 replied 2 months ago

y​eah I would be curious

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Customer reply replied 2 months ago
the dealer said that the control panel had to be changed before they could proceed with any other fix. The control panel was shorting out and making the fans run out of sequence. Ordered a control panel off the internet for 70.00 better than the 650.00 they wanted to charge. Just got home and I have no dome light. Back to checking fuses again in the am.
Mechanic for Honda: eric remington,
 replied 2 months ago

d​o you have compressor activation? yes fans should work when ac on. maybe a fuse was blown inadvertently when they worked on. let me know if I can help

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Customer reply replied 2 months ago
No I posted when ac was on fans went off
Mechanic for Honda: eric remington,
 replied 2 months ago

y​es but if compressor does not engage fans will not come on...designed that way

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Mechanic for Honda: eric remington,
 replied 2 months ago

I​f compressor actually engages fans should too. If the compressor clutch does not engage, then the fans are not commanded on either

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Mechanic for Honda: eric remington,
 replied 2 months ago

I​ get your point the fans don't come on and you mentioned that ...but for me that's a given. when the ac compressor clutch issue fixed the fans most probably will too, as they are both commanded on same time.

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Mechanic for Honda: eric remington,
 replied 2 months ago

so what did they do to fix compressor?

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Customer reply replied 2 months ago
No
Mechanic for Honda: eric remington,
 replied 2 months ago

Do you need help or should I opt out

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Mechanic for Honda: eric remington,
 replied 2 months ago

WE​ll I will leave option open I can provide schematics and online /over phone wire/component tracing...been doing it for over 35 years

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Mechanic for Honda: eric remington,
 replied 2 months ago

do​ this put in your control head and then let me know if you still need help....it seems odd that motor loads up ....so control switch head must be giving some kind of input....

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Mechanic for Honda: eric remington,
 replied 2 months ago

did you already buy it?

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Mechanic for Honda: eric remington,
 replied 2 months ago

most ac systems are designed to kick fans on when ac turned on. A few are designed to operate when a certain pressure is acheived

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Mechanic for Honda: eric remington,
 replied 2 months ago

if fans came on as soon as you turned ac on in past then ur vehicle is set up that way not thru pressure

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Mechanic for Honda: eric remington,
 replied 2 months ago

ok?

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Mechanic for Honda: eric remington,
 replied 2 months ago

f​ans also come on when certain temp reached otherwise they are off. when ac off, fans cycle on and off depending on radiator temperature.

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Mechanic for Honda: eric remington,
 replied 2 months ago

A​s you are probably aware fans are not designed to run all the time...unless ac on

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Customer reply replied 2 months ago
I’m driving
Mechanic for Honda: eric remington,
 replied 2 months ago

If fans run all the time with ac off that's not normal and should be addressed ok I wont write further let me know

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Customer reply replied 2 months ago
I will know more on Saturday when my control panel comes in
Mechanic for Honda: eric remington,
 replied 2 months ago

I​ hope that makes a difference or fixes it...if not I'm always here

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Customer reply replied 2 months ago
I will keep you posted.
Mechanic for Honda: eric remington,
 replied 2 months ago

k

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Mechanic for Honda: eric remington,
 replied 2 months ago

I​ know the system keeps prompting you to respond ..me too..lol I like to be the last, that way I know when you have something.... laugh out loud

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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