No power to A/C control module

  • 2006 HONDA CRV
  • 2.4L
  • 4 CYL
  • 4WD
  • 140,000 MILES
Stage 1.

A/C started blowing hot air, took it to a friend of mine, he noticed the A/C light on the climate control was on and green, he plugged in A/C gauges from AutoZone and notice the system was charged but same pressure on low and high (150 PSI).

Stage 2.

He tried to add a can of Freon but I notice instead of the the refrigerant going in the system the can got pressurized from the systems into the can.

Stage 3.

He checked the fuses and relays and wondered why the A/C clutch was not engaging this whole time so he said he needed a relay bypass switch to send power directly to clutch to se if it even engages at all.

Final stage of problem.

He got a piece of wire disconnected the A/C compressor relay and jumped the bottom slot into the negative battery terminal. That's when the fans stopped working and the A/C climate controls lost power.

Now my vehicle is sometimes overheats when it idles, my blower motors does not blows.

He checked the fuses underneath the steering wheel and in the engine compartment and only was was blown (20 amp fan) after replacing nothing was fixed.

Friend told me it was probably a fuse somewhere.

I found a diagram of the relay that was shorted to ground

Vehicle listed above is an SE model.
Do you
have the same problem?
Tuesday, June 15th, 2021 AT 1:05 PM

1 Reply

These all could be related but we need to start with the A/C system.

The system is currently overcharged. If both sides with a static system were at 150 PSI then that is already too much Freon. So if he tried to add more then that makes sense that the system would not take more.

Depending on temperature you should have around 90 PSI as it is the summer in most places. So we need to evacuate and recharge the system and set it to the proper level.

Here is a guide that will help with this:

Below is a chart showing proper PSI and possible causes so let's start with this information and go from there. Thanks
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Thursday, June 17th, 2021 AT 3:43 PM

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