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 HVAC outside air temp.

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turtleman
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PostSubject: Problem with outside temp meter for HVAC   Mon Nov 03, 2008 7:14 pm

Lately, right around when I put the timing commander in, the display on the climate controls shows outside temperatures that are absurdly high (between 90F and 110F) This is consistent and doesn't seem to change with underhood temp at all. Any ideas and where is this sensor located?
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Rickw
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PostSubject: Re: HVAC outside air temp.   Mon Nov 03, 2008 8:26 pm

Sensor is in front of A/C condenser/radiator down low, near the bottom. can't miss it if your looking for it. Open hood and look for black sensor bolted or screwed to support.
There should be specific resistance measurements for it in the Factory Manual.
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deekster_caddy
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PostSubject: Re: HVAC outside air temp.   Mon Nov 03, 2008 9:41 pm

Screwing with the IAT sensor (timing commander) will mess up the outside temp display in my experiences, even though you haven't touched the HVAC's outside air temp sensor.
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turtleman
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PostSubject: Re: HVAC outside air temp.   Mon Nov 03, 2008 9:49 pm

deekster_caddy wrote:
Screwing with the IAT sensor (timing commander) will mess up the outside temp display in my experiences, even though you haven't touched the HVAC's outside air temp sensor.

I thought that also but wouldn't I then see a change any time I switch the timing commander? In any case, I'll reconnect my IAT sensor and see what happens.
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deekster_caddy
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PostSubject: Re: HVAC outside air temp.   Mon Nov 03, 2008 9:53 pm

I've dealt with two cars with timing commanders, and both had f'd up outside temp readings. I never troubleshot the problem, just my observation is all... :shrug:
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turtleman
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PostSubject: Re: HVAC outside air temp.   Mon Nov 03, 2008 11:22 pm

Well if that's the case, timing commander FTW
I have two thermometers built into my chest that work just fine.
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1995Riviera
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PostSubject: HVAC outside air temp.   Thu Apr 02, 2009 5:09 pm

Maybe someone can clue me in. The outside temperature reading in my HVAC control is never right. Is there a sensor somewhere that could be the culprit or is it in the unit itself? I'm referring to the reading on the control unit in the dash.
Thanks.
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AA
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PostSubject: Re: HVAC outside air temp.   Thu Apr 02, 2009 5:17 pm

Hi Wesley. The temp sensor is mounted in front of the radiator at the bottom right, inside the grey front fascia. It often becomes broken from its mount, and could be touching the radiator, causing a high reading.

Is the dash reading always high or low, or is it random? How far off is it? Any other pattern that would give clues?

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EatDirtFartDust
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PostSubject: Re: HVAC outside air temp.   Thu Apr 02, 2009 5:28 pm

Not to hijack, but I have a similar problem. Mine is always about 5 degrees too low...
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DEMonte1997
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PostSubject: Re: HVAC outside air temp.   Thu Apr 02, 2009 11:40 pm

The sensors are really cheap. I think I got mine for $10 at the dealer. Might be worth replacing if the * is off enough.
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1995Riviera
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PostSubject: Re: HVAC outside air temp.   Tue Apr 07, 2009 11:10 pm

Mine is always low as well but sometimes more than the 5 degrees of "The Josh". I might see if my local dealer has one tomorrow.
Thanks for all the health!
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Rickw
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PostSubject: Re: HVAC outside air temp.   Wed Apr 08, 2009 6:26 pm

I bought one at NAPA several months ago.
NAPA P/N = TS4025 ; Cost $23.39 + Tax
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