HVAC issue

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Jul 14, 2020 | 09:01 PM

DA1984VETTE

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Drifting

Joined: Jan 2008

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From: New Madison Ohio

A/C issue

My air conditioning is blowing hot air. Checked to see if it had thrown the a/c belt it hadn't. Checked to see if the a/c was kicking on and off. I had my wife turn the air conditioning on and off to see if the compressor was kicking on and off and it was. I bought a can of AC Pro that I had purchased for another vehicle I own hooked it up and it showed it was charged, but I know this isn't the correct way of checking. I was reading about the outside air ambient sensor could possibly be causing the a/c not to work. I checked where it is supposed to be and can not locate the sensor. If that sensor is missing could it be the reason my a/c is not working?

Last edited by DA1984VETTE; Jul 14, 2020 at 10:49 PM.

Jul 15, 2020 | 09:04 AM

C5 Diag

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From: Cape Coral, Florida

First off had the AC been working properly prior to now and just recently had stopped working ??....Do you know how to access trouble codes through the DIC ??...video below if you’ve never done that...post all DTC’s that you see and see if they are H (history) or C (current)...HVAC issues will be “B” codes !!...is this manual or automatic HVAC system ??

Jul 15, 2020 | 09:39 AM

DA1984VETTE

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Drifting

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From: New Madison Ohio

Quote:

Originally Posted by C5 Diag

I don't use the a/c much but it has been hot here. It was working last year and when I went to use it the first time this year is when I noticed that it was blowing hot air thru the vents. I checked the the codes and the only b code was a 1545c h which is the clutch relay I believe. I checked the fuse it was good and I also pulled the relay and exchanged it with another relay and still the same hot air. The compressor is kicking on and off. It is a manual HCAV system.

Last edited by DA1984VETTE; Jul 15, 2020 at 09:43 AM.

Jul 15, 2020 | 09:56 AM

C5 Diag

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From: Cape Coral, Florida

And this is manual or automatic HVAC ??..it is good that the clutch engages so we know the inputs are OK...I would check the system pressure first because that’s fairly quick and easy...I doubt you have gauges to check your high and low side pressures.

Last edited by C5 Diag; Jul 15, 2020 at 09:59 AM.

Jul 15, 2020 | 09:58 AM

DA1984VETTE

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Drifting

Joined: Jan 2008

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From: New Madison Ohio

Quote:

Originally Posted by C5 Diag

And this is manual or automatic HVAC ??

Manual

Jul 15, 2020 | 10:05 AM

C5 Diag

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From: Cape Coral, Florida

May be a good idea to rent some pressure gauges from “The Zone” or from Pep Boys and see what you have !!

Jul 15, 2020 | 10:23 AM

DA1984VETTE

Thread Starter

Drifting

Joined: Jan 2008

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From: New Madison Ohio

Quote:

Originally Posted by C5 Diag

May be a good idea to rent some pressure gauges from “The Zone” or from Pep Boys and see what you have !!

OK..Thanks for your time. I will see if I can get some or have someone check them for me. Again thanks for your help.

Apr 20, 2021 | 08:44 AM

DA1984VETTE

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Drifting

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From: New Madison Ohio

I had forgot when I had the a/c checked a couple of years ago they had put dye in it to see where or if it was leaking. I had it a dealership to have the oil changed...I know but had some health issues preventing me from doing it. They checked and sure enough the compressor was leaking. They replaced it and now working. Thanks for all who responded.