WILL BLOWER MOTOR RESISTOR FAILING CAUSE AC COMPRESSOR TO NOT ENGAGE

  • Tiny
  • Carguy598
  • 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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have the same problem?
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No
Saturday, June 30th, 2012 AT 1:07 AM

9 Replies

  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

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

Roy

Roy

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Saturday, June 30th, 2012 AT 1:11 AM
  • Tiny
  • Carguy598
  • MEMBER

I personally charged to proper level of freon and compressor will not engage.

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Saturday, June 30th, 2012 AT 1:15 AM
  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

How much did you install? What were the pressures when you jump the compressor?

Roy

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Saturday, June 30th, 2012 AT 1:38 AM
  • Tiny
  • Carguy598
  • MEMBER

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

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Saturday, June 30th, 2012 AT 2:30 AM
  • Tiny
  • Carguy598
  • MEMBER

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.

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Saturday, June 30th, 2012 AT 3:02 AM
  • Tiny
  • Mikederouin88
  • MEMBER

Have you tried to bypass the clutch cycle switch?

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Saturday, June 30th, 2012 AT 4:12 AM
  • Tiny
  • Carguy598
  • MEMBER

I did bypass the cycle switch. Still made no difference.

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Saturday, June 30th, 2012 AT 9:33 PM
  • Tiny
  • Carguy598
  • MEMBER

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.

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Saturday, June 30th, 2012 AT 10:03 PM
  • Tiny
  • Carguy598
  • MEMBER

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!

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Friday, July 6th, 2012 AT 1:48 AM

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