Cooling problems/ a/c
02-15-2019, 08:33 PM
#1
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Join Date: 02-15-2019
Location: St.martinville
Posts: 2
Cooling problems/ a/c
Ok so my cooling fan isn't running and my a/c isn't blowing cold and I'm almost positive that they are linked. It's not a relay as far as I can tell and all fuses are good. I'm thinking it could be a dirty connection to the high pressure sensor for the a/c causing it. Any help with this would be great.
Also I can't find the pressure sensor
Also I can't find the pressure sensor
02-15-2019, 09:07 PM
#3
Thread Starter
Join Date: 02-15-2019
Location: St.martinville
Posts: 2
Its a 2008 Lt hhr I haven't let it get that hot only to 212 and I shut it down being that water boils at 212 ° normal operating temperature should it not be at about 195° ? I think it's linked because the fan doesn't even come on when a/c is on and compressor starts then shuts down much like it's getting hot and a/c pressure rises till switch shuts a/c down. I've heard that a pressure sensor will cause this and also temp sending unit can also cause it. But right now I'm kinda lost. My scanner tells me it's in the low 200's 201-213 or so at what temp is it designed to turn on ?
02-15-2019, 09:27 PM
#5
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Join Date: 01-23-2009
Location: Fredericksburg, Virginia
Posts: 24,691
You are getting some really crazy info.
Under normal operation the fan should turn on at 219F until it gets down to 180F. Water does not boil at 212F under pressure.
Is the CheckEngineLight on?
The fan should come on IF the A/C compressor is running.
If the engine does not get up to 180F fast enough the A/C will not run, usually that will cause a CEL.
If the compressor comes on then stops you should be finding somebody that works on A/C to fix it.
Under normal operation the fan should turn on at 219F until it gets down to 180F. Water does not boil at 212F under pressure.
Is the CheckEngineLight on?
The fan should come on IF the A/C compressor is running.
If the engine does not get up to 180F fast enough the A/C will not run, usually that will cause a CEL.
If the compressor comes on then stops you should be finding somebody that works on A/C to fix it.
Last edited by donbrew; 02-15-2019 at 10:16 PM.
02-15-2019, 10:12 PM
#6
Platinum Member
Join Date: 12-06-2009
Location: Alabama
Posts: 11,098
quote: "My scanner tells me it's in the low 200's 201-213"
But what does the car's info say on the dash ? (you do know there is a digital temp gauge in the info center on the dash ?) And I don't mean the analog gauge.
As far as the AC issue, could be any number of things. I've worked on many automotive AC's over the years. From your description it sounds like maybe you're not very knowledgeable with the AC system. Best to take this one to a pro.
But what does the car's info say on the dash ? (you do know there is a digital temp gauge in the info center on the dash ?) And I don't mean the analog gauge.
As far as the AC issue, could be any number of things. I've worked on many automotive AC's over the years. From your description it sounds like maybe you're not very knowledgeable with the AC system. Best to take this one to a pro.
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