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Ask Kevin Bourcier Your Own Question
Kevin Bourcier
Kevin Bourcier,
Category: Acura
Satisfied Customers: 117
Experience:  Owner/Technician at Max Air Mobile
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I have a 2007 acura tl was wrecked in front and repaired.

Customer Question

hi I have a 2007 acura tl was wrecked in front and repaired. went to get a/c charged, they told me compressor kicks on, condenser stays full, no leak, but a/c still doesn't work, hes not a mechanic so hes not sure what it could be, I have car at my shop so I need to know what to look at to fix this asap.
Submitted: 10 months ago.
Category: Acura
Customer: replied 10 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  Kevin Bourcier replied 10 months ago.

hello I can try to help you with this

Expert:  Kevin Bourcier replied 10 months ago.

I am currently unable to use the phone service for this .

Customer: replied 10 months ago.
ok
Expert:  Kevin Bourcier replied 10 months ago.

you say that the A/C compressor " does " turn " ON " ?

Customer: replied 10 months ago.
it does..
Expert:  Kevin Bourcier replied 10 months ago.

and do you have air blowing from the dash vents ?

Expert:  Kevin Bourcier replied 10 months ago.

I will assume that the blower is working .

Customer: replied 10 months ago.
air is blowing
Expert:  Kevin Bourcier replied 10 months ago.

okay and it is blowing warm air and the air conditioning compressor is turning on , Correct . Does the Air Conditioning condenser cooling fan turn on also ?

Customer: replied 10 months ago.
fan turns on aswell.. and blowing warm air
Expert:  Kevin Bourcier replied 10 months ago.

okay , the fan on the radiator/condenser in the engine compartment is turning on ?

Expert:  Kevin Bourcier replied 10 months ago.

If you are certain that it has the correct refrigerant charge in the A/C system it is most likely that the Heater valve is stuck in the " hot " position even though you are setting it for " cold " . There is a valve on the heater case that stops engine coolant flow through the heater core when the A/C is on

Expert:  Kevin Bourcier replied 10 months ago.

to confirm this you can clamp off the to heater hoses at the firewall and continue running the car for 15 or 20 minutes and see if the air turns cold

Expert:  Kevin Bourcier replied 10 months ago.

another quick check is to check the temperature of the " suction " hose . it is the large hose in the illustration . When the A/C is on this hose should feel quite cold .

Customer: replied 10 months ago.
it is correct a/c charge, I don't believe the heater valve is stuck..mechanic told me to check pressure switch?
Customer: replied 10 months ago.
I tried unclamping the heater hoses at the firewall no cold air
Expert:  Kevin Bourcier replied 10 months ago.

I think you need to confirm that the front " clutch " Plate on the compressor is " locking and turning

Expert:  Kevin Bourcier replied 10 months ago.

is the A/C suction hose cold ?

Customer: replied 10 months ago.
it is locking and turning. and no its not cold
Expert:  Kevin Bourcier replied 10 months ago.

can you connect onto the service ports to check the pressures . At this point it appears that your compressor is defective . If the compressor is locked and rotating you should see 20-30 psi on the low side and 150 to 200 psi on the high side . if the pressures are equal ( 75 psi ) that indicates that there is no " pumping " action being generated by the compressor .

Customer: replied 10 months ago.
how can we check the pressure switch my mechanic told me it should be that..
Expert:  Kevin Bourcier replied 10 months ago.

you need to put a service , manifold gauge set on and check the system pressures . this is critical information required in order determine your problem at this point .

Customer: replied 10 months ago.
I don't have that machine here with me I just called my a/c person he said there was no problems with pressures.
Expert:  Kevin Bourcier replied 10 months ago.

you need to put a gauge set on and tell me what you are seeing for pressures in order for me to help you further . I need specific information at this point . if the suction hose is NOT cold , the system is either empty or the compressor or expansion valve is defective .

Customer: replied 10 months ago.
which one is the expansion valve
Customer: replied 10 months ago.
mechanic said my compressor is fine and the condenser is full
Customer: replied 10 months ago.
your saying you don't know how to test the pressure switch? can I please speak with another acura technician
Expert:  Kevin Bourcier replied 10 months ago.

certainly . you can ask another technician but what you are saying is happening is not a pressure switch problem

Expert:  Kevin Bourcier replied 10 months ago.

If the pressure switch was at fault the A/C compressor would not turn on .

Customer: replied 10 months ago.
what could it be my compressor is fine
Expert:  Kevin Bourcier replied 10 months ago.

there is no way to know that your compressor is fine with out confirming that the operating pressures are what I listed previously . before going any further you need to know the system pressures .

Customer: replied 10 months ago.
OK WILL LET YOU KNOW THIS EVENING
Expert:  Kevin Bourcier replied 10 months ago.

okay . thanks

Customer: replied 10 months ago.
hi kevin I went to my actual mechanic he vacummed and put in the correct pressures as per manufacture on his snap on a/c tool. so there is no leak what so ever, the compressor is does not turn on, he checked if its seized and its not. so problem is from that so please guide me I am beside the car now at my shop
Expert:  Kevin Bourcier replied 10 months ago.

okay so when you turn on the car and the A/C and the blower set to hi . Do you get full blower fan from the dash vents ?

Expert:  Kevin Bourcier replied 10 months ago.

check fuse # ***** and # ***** in fuse panel under the dash

Expert:  Kevin Bourcier replied 10 months ago.

check fuse #30 , 12 and 21 under the hood

Customer: replied 10 months ago.
I do get full blower fan let me check fuses I will get back to you in 5 min
Expert:  Kevin Bourcier replied 10 months ago.

Sure !

Customer: replied 10 months ago.
all fuses checked ok
Expert:  Kevin Bourcier replied 10 months ago.

do you have a test light ?

Customer: replied 10 months ago.
I do have a test light yes
Expert:  Kevin Bourcier replied 10 months ago.

okay , i understand that the fuses are " good " but did you check both sides of the fuses with the key on and A/C turned on ( preferably with the engine running )

Customer: replied 10 months ago.
I did! both sides with car on and a/c on
Expert:  Kevin Bourcier replied 10 months ago.

find the relay under the hood . check for voltage on terminal 4 if there is power tere jumper #2 and 4 . see if the compressor turns on

Customer: replied 10 months ago.
I'm not to sure what your saying can you please be specific
Expert:  Kevin Bourcier replied 10 months ago.

can you find the A/C relay in the junction in the engine compartment

Customer: replied 10 months ago.
I know where it is
Expert:  Kevin Bourcier replied 10 months ago.

remove the relay and use the test light to check for power . there should be power to one terminal with the key " off "

Customer: replied 10 months ago.
I took the relay off with the key off only the bottom one lights up. when I turn key on the right top lights on.
Expert:  Kevin Bourcier replied 10 months ago.

okay . if you put the rely back in do you here it clicking on and off with the A/C button ?

Customer: replied 10 months ago.
when I toggle the a/c button off and on yes I do hear a clicking from the relay.
Expert:  Kevin Bourcier replied 10 months ago.

does this look like your relay ?

Customer: replied 10 months ago.
no theres no #4. only 4 pins. only #1 lights up when keys off. and #3 lights up aswell when keys on
Expert:  Kevin Bourcier replied 10 months ago.

are there 2 pins that are " big " ?

Customer: replied 10 months ago.
the 2 bottoms one are bigger than the top yes. #1 and 2 are bigger than the others
Expert:  Kevin Bourcier replied 10 months ago.

okay . with the engine running , A/C on . use a piece off wire and bridge the two large pins , 1 & 2. does the clutch turn on ?

Customer: replied 10 months ago.
no nothing happens
Expert:  Kevin Bourcier replied 10 months ago.

when you put a wire into those 2 receptacles of the relay box the A/C compressor does not turn on ? and the 2 pins both light up with your test light ?

Customer: replied 10 months ago.
only 1# ***** up with test light not #2
Expert:  Kevin Bourcier replied 10 months ago.

okay . with the engine running , A/C on . use a piece off wire and bridge the two large pins , 1 & 2. does the clutch turn on ?

Customer: replied 10 months ago.
I just tried that no spark happens and no the clutch does not turn on
Expert:  Kevin Bourcier replied 10 months ago.

are you pushing a " jumper " wire down into the receptacles ( sockets ) in the relay box ?

Expert:  Kevin Bourcier replied 10 months ago.

you will need to leave the jumper in and check with your test light at the A/C compressor connector

Expert:  Kevin Bourcier replied 10 months ago.

only one wire at the compressor clutch should light up on your test light .

Customer: replied 10 months ago.
ok which oneis the a/c compressor connector, and I did put it all the way in and still no clutch on
Expert:  Kevin Bourcier replied 10 months ago.

the connecter on the front of the A/C compressor on the motor

Customer: replied 10 months ago.
with the wires on 1 and 2 and with relay on too the test light lights up from the engine harness that connects to a/c compressor
Expert:  Kevin Bourcier replied 10 months ago.

okay . yes the wire at the A/C compressor needs to light your test light . Does it ?

Customer: replied 10 months ago.
the one that goes from engine harness to a.c compressor plug or unplug from a/c compressor and test that?
Expert:  Kevin Bourcier replied 10 months ago.

yes the there should be power down to your A/C compressor

Customer: replied 10 months ago.
which wire and how do I reach it
Expert:  Kevin Bourcier replied 10 months ago.

you will need to gain access to it and check it

Customer: replied 10 months ago.
whats the best and fastest way to gain access please advise
Expert:  Kevin Bourcier replied 10 months ago.

here is a diagram of the compressor

Customer: replied 10 months ago.
could it possibly be pressure switch or no?
Expert:  Kevin Bourcier replied 10 months ago.

NO .. that relay needs to power the A/C compressor on . When you jumper that circuit at the relay box . that sends power to the A/C clutch . if you jumper the relay sockets and the compressor does not engage then either the wire going between the relay box and the compressor has a break in it or the compressor clutch coil is defective . that is why you need to see if there is power at the A/C clutch connector . look up from underneath the car . you should be able to get to the A/C connector easily from under the car

Customer: replied 10 months ago.
which wire is the a/c connector under the car please advise so I can check now.
Expert:  Kevin Bourcier replied 10 months ago.

i sent you a picture of the a/c compressor and the connector .

Customer: replied 10 months ago.
which connector am I looking at tho with the test light?
Expert:  Kevin Bourcier replied 10 months ago.

the connector that is right on the front of the A/C compressor

Customer: replied 10 months ago.
the one that is physically on the compressor 2 wires? 1 ground that's on the compressor and other wire that gets power from the car harness>?
Customer: replied 10 months ago.
I checked with my test light yes there is power going to that plug that goes into the compressor
Expert:  Kevin Bourcier replied 10 months ago.

okay and the other wire ? only one wire can have power the other wire needs to ground . if that is the case then you have a faulty clutch coil .

Customer: replied 10 months ago.
only one wire lights up like you said, the ground doesn't.
Expert:  Kevin Bourcier replied 10 months ago.

okay so with the one wire lit up and if you start the engine and the compressor does not lock up and run then that confirms the fault is with your compressor .