Question about 2004 Honda Accord

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I have a 2004 Honda Accord. The a/c compressor will not come on. The windsheild wipers work when they decide to. I have switched relays around but to no avail. Some one tell me whats wrong. The blower motor resister was bad last summer and the fan wouldn't come on but that has been replaced. Now it works. Heat works but no air.

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Looking at wiring diagrams , using A DMM- digital multi-meter an testing the electrical circuit's is the way to find the problem . Because without testing anything said on here would just be guessing . Someone mite get lucky suggesting something to replace, this or that . You could replace a bunch of parts too , before fixing the problem. There is a relay in the electrical circuit that egages the compressor clutch on command from the PCM/ECM -engine computer . Windshield wipers problem could be a simple loose connection ,ground or voltage . Or the motor could be getting ready to go out all together .
Free wiring diagrams here
Enter vehicle info. year , make , model an engine size . Under system click on HVAC ,then under subsystem click on HVAC controls . Click search button then the first blue link . Shows fuse's ,relay ,A/C pressure switch , evap. temp sensor . All these have to be right or the computer will not turn on the compressor . The computer would also have to see a command from the HVAC control head . Alot has to happen before the computer will turn on the A/C .
Electric Testing Techniques You Need to Know

The Trainer 40 When the compressor won compress

Posted on Nov 10, 2017


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Posted on Jan 02, 2017



  • 76 Answers

SOURCE: 2001 honda accord, air conditioner is not working,

one fan is for the a/c it will cycle on when the a/c is turned on the other fan should be linked to the temperature sensor. check your fuses if you haven't already. then check your temp sensor. i'm not sure on a honda but most newer cars have multiple sensors so you will have to find out which on is for the fan. also you need to find out if the fan is controled by a pcm as some new model cars have almost everything controled through the powertrain control module

Posted on Mar 07, 2009


  • 11 Answers

SOURCE: The blower motor checks good but doesn't come on


Posted on Sep 20, 2009


  • 52 Answers

SOURCE: My 2004 Honda civic heater is not working. The

Check all terminals.

Posted on Jan 08, 2010



  • 200 Answers

SOURCE: jump air compressor ac works replace relays same issue HONDA

the compressor may be low on freopn but, the fan problem is most likely the fan motor as it is the low temp fan and will run more often than both test see if you can switch the fan plugin to the other fan watch carefully that it does not get too hot as the second fan is a safety fan that works as high temp or when using the A\C

Posted on Jul 13, 2010

Shane Gannon

  • 1949 Answers

SOURCE: 1992 Honda Accord (yeah, very

blower motor resistor

Posted on Nov 27, 2010

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1 Answer

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1 Answer

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