I have a 2004 Honda Accord V6 EX 4 door with automatic transmission.
My problems began about a year ago when the blower motor died. I replaced the blower no problem easy job. Then the AC started working sporadically. After reading through the forums and some PM with hondadude I checked the resistor (under the dash near the blower, if I am calling it the wrong thing) and it was in the the stated range of 1.5kw. Well fall then winter came and I forgot about the AC but now summer is here and I could use a little cool air. The clutch is not engaging on the compressor so I figured I would check the low pressure. I bought an all in one gauge and freon for pepboys and when I checked the low side pressure it is well over 100 pounds (car running and not running) I know that is not good. Then I tried the self DX with the control unit in the car and it goes through some kind of diagnostics but does not return a code.
I would jump the clutch but don't really know how to do that or if it would even be wise at this juncture.
Any help would be appreciated even if it is take it to the dealer.

 

A pressure of 100 psi on low side of ac system is OK, given no compressor action. This simply reflects static pressure of your ac system charge and indicates that saturated condition (some liquid) is likely. This should be adequate to cause the compressor to run (at least briefly).

Since compressor is not running, you need to determine a couple of things:

1) When compressor should be running (AC on, blower on, keyswitch On), do you have 12v to the compressor clutch connector. Disconnect and measure voltage on single pin.
2) If no voltage, check the AC Pressure Switch contacts. Remove connector and measure resistance across sensor contacts. It should be zero ohms if switch is closed (should be closed w/ 100 psi pressure).

Report back what your find and we'll proceed from there.

good luck

 

Thanks for the help I will do those two things and check back.

 

Hi, were you able to fix the problem with your AC. Its been some time I realize but thought I'd give it a shot. I have an 03 Accord just the same as yours and nothing on the ac works and the display seems to work just fine. Mine has the dual climate control and a 4 wire AC pressure switch. I verified the blower fan works on the bench. I applied DC battery voltage with a 20 volt cordless drill battery to the compressor and got the clutch to engage across terminals 1 and 2 of the compressor clutch relay socket (switch side). Then I jumped or by-passed the switch part of the compressor clutch relay with a 26 gauge wire and put the relay back in place, Started the engine and the AC compressor ran but the blower fan inside still did not run, the high side of the system got warm and low side was cold as it should. just curious if you found the problem with your AC and what you did to fix it, were you able to get the self-diagnostic feature to work and how the activate it? I'm almost at a loss and really trying to avoid the dealer. LOL
I have all the previous service records and the blower fan inside and the radio component has been replaced before.
Any help greatly appreciated.