Mechanics

WILL BLOWER MOTOR RESISTOR FAILING CAUSE AC COMPRESSOR TO NOT ENGAGE

1999 Honda CRV • 150,000 miles

I have recharged my air, tested pressure switch on drier, checked relay and a/c won't work. If I apply power at compressor pigtail it will engage.
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Carguy598
June 30, 2012.



No, it is a separate system. Have the freon pressures checked.

Roy

Roy


ASEMaster6371
Jun 30, 2012.
I personally charged to proper level of freon and compressor will not engage.


Tiny
Carguy598
Jun 30, 2012.
How much did you install? What were the pressures when you jump the compressor?

Roy


ASEMaster6371
Jun 30, 2012.
Evacuated system, vac for 35 mins, added 24oz, spec is 22 to 24.7. Pressures were 35 low, didnt have high side guage hooked up though


Tiny
Carguy598
Jun 30, 2012.
It appears that when the switch is turned on, there is not power going to compressor, continuity between relay box and compressor is good, fuse is good.


Tiny
Carguy598
Jun 30, 2012.
Have you tried to bypass the clutch cycle switch?


Tiny
Mikederouin88
Jun 30, 2012.
I did bypass the cycle switch. Still made no difference.


Tiny
Carguy598
Jun 30, 2012.
It appears that after further diagnostics, there is a self diagnostics through the control head, if there are any codes it will tell the pcm not to engage compressor. I ran self diagnosticcs and it had blower speed fault. Went through testing and found out that resistor is causing blower speed fault. Will have the part in 3 days, will update when part comes in if that resolved my issue. Thank you to all who responded and tried to help me through this.


Tiny
Carguy598
Jun 30, 2012.
UPDATE ON REPAIRS: I replaced blower motor resistor, went through self diagnostics again as directed by trouble shooter. Started vehicle and turned on air. Works great! 31 degree drop at center vent!


Tiny
Carguy598
Jul 6, 2012.