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Just replaced Compressor because it was going bad. Now, the…

Customer Question
Just replaced Compressor because it...
Just replaced Compressor because it was going bad. Now, the Compressor won't turn on.
Submitted: 3 years ago.Category: Honda
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Customer reply replied 3 years ago
Compressor was installed by a mechanic. He checked the A/C Clutch relay and the low pressure switch.
Answered in 7 minutes by:
5/21/2015
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
Honda-Man
Honda-Man, Honda Mechanic
Category: Honda
Satisfied Customers: 3,314
Experience: I have an Associates Degree in Automotive. 10 Years experience on all makes and models. 20 Years Honda only including factory training. Over 30 years total.
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Hello, year and model of your Honda?Did it work before? Thanks, Honda-Man
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Customer reply replied 3 years ago
2008 Honda Civic. It did work, but only for a few minutes at first and then would blow hot air. Now a new compressor is installed and it doesn't work. Xtremely frustrated.
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
Is there power going to the compressor clutch?
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Customer reply replied 3 years ago
I assume there is since it kicks on when the relay is jumped
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
Do you know how the pressure switch was checked? Your Civic uses a pressure sensor not a pressure switch.
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Customer reply replied 3 years ago
No, I don't
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
If the sensor is improperly jumped(tested) to make the compressor run it can fry the engine control unit. This will either make the A/C inoperative or cause the engine to quit running.
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Customer reply replied 3 years ago
I'm pretty sure he didn't jump the sensor.
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
Lets hope not. It looks like the pressure switch and is in the same location. It takes the place of the older pressure switch but is a sensor.
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Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
Do the fans come on when the A/C is turned on? Knowing this will help narrow down the cause.
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Customer reply replied 3 years ago
No, they do not.
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
OK, either the system is not charged, not charged enough or there is an electrical problem with the compressor relay controls.If the compressor came on when the relay socket was jumped the compressor clutch, compressor clutch fuse and wiring are OK.Check fuse #36 (10a) in the under-dash fuse box. This fuse is for the relay control.Swap the fan relay with the compressor relay to see if the compressor will come on. The relays go bad all of the time.
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Customer reply replied 3 years ago
Ok I will. Are the fan relay and compressor relay under dash or under hood?
Customer reply replied 3 years ago
Haven't been able to pull the under dash fuse #36. Do I need a fuse puller or is there an easy trick?
Customer reply replied 3 years ago
Just checked and swapped fuses. Fans won't turn on
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
There should be a fuse puller under the under-hood fuse box lid or pushed into the under-dash fuse box. A small pointed knife works too. Do you mean relay's?
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Customer reply replied 3 years ago
Ok I just checked fuse 36 and swapped the relays and fans won't turn on.
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
Is the ignition on and is the fan inside on?
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Customer reply replied 3 years ago
Yes, ignition is on and fan inside is on.
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
I am trying to find suggestions that you can do. Most of my diagnostic tests require the Honda HDS scan tool. Is the check engine light on? Some codes will keep the A/C from working.
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Customer reply replied 3 years ago
No, but the airbag light is on.
Customer reply replied 3 years ago
The fans did turn on for 30 Seconds
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
OK, Not sure what to suggest next? The ECU controls the compressor relay using the pressure sensor as an input. Did the compressor kick on? try it running.
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Customer reply replied 3 years ago
This sucks.
Mechanic for Honda: Honda-Man, Honda Mechanic replied 3 years ago
Yes I agree, sorry I have not been of more help. The A/C system is controlled by the ECU to improve fuel economy so it's harder to diagnose than older systems. Honda diagnosis requires the use of the HDS tool to avoid damaging the ECU during testing. You could have the dealer diagnose the problem for you then you can do the repair to save money. Hope this won't stand in the way of a positive rating. Thanks for allowing me to assist you, Cliff
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