[chrisexv6]

Hooked a gauge set up to my A/C (its blowing, but not cold). Both low and high sides were low. I charged it a little, keeping in mind that the thermo control amp *might* be the problem (I followed the service manual procedure for troubleshooting, and it did NOT point at the amp.....it pointed at low refrig. level)

My question is.....does the thermo control amp affect the pressures? i.e. now that Ive charged it up a little, once the amp is replaced does that normal charge level become a high charge level?

Just want to be prepared, if I need to evacuate the system to lower the refrig. level.

Thanks.

-Chris

 

[chrisexv6]

Took another quick look at it and have another question....

I know the thermo control amp works by cycling the compressor. How does it do this? Does it release the magnetic clutch?

I can see when the clutch is off (with A/C off) and I can see the clutch goes on and stays on with the A/C set to on, so Im wondering if its *not* a thermo-control issue (which would seem rare)

-Chris

 

[Q451990]

If the clutch is engaged, the sensor isn't your problem. The sensor is an input to the controller, that in turn tells the ECU to ground the A/C relay. So if the sensor was bad the ECU would never engage the compressor clutch.

Heath

 

[chrisexv6]

If the clutch is engaged, the sensor isn't your problem. The sensor is an input to the controller, that in turn tells the ECU to ground the A/C relay. So if the sensor was bad the ECU would never engage the compressor clutch.

Heath

Thanks. Thats what I thought but wanted to be sure.

Even more odd is the fact that my last Frontier "lost" its cooling around the same age as my current Frontier. The old one needed a recharge, and it seems this one might too. Really strange coincidence.

I used a 10.25oz can of r134a. Most of it is in (I hear a little left in the can but I didnt want to overdo the charge). High side was around 150 psi, low side was around 30. That makes the high/low ratio off. High should be around 180 psi and low should be around 31 psi at the same time.

Does adding more refrigerant bring the low side down while bringing the high side up?