A/C is blowing hot and cold
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- Posts: 1
- Joined: Fri May 17, 2013 10:53 pm
A/C is blowing hot and cold
I have a 2000 Chev. S-10 Blazer 4.3 that just had lower intake gaskets replaced and now, when the a/c is turned on, air goes hot to cold to hot, not warm, repeatedly. It has climate control and the compressor is staying on, not cycling. A/C was working perfectly before gaskets were replaced. HELP PLEASE!!!!!
Re: A/C is blowing hot and cold
You might want to look and make sure everything is plugged in, especially on the back of the compressor. It would have had to been moved during the intake job so probably has something to do with that. There are two connectors on the back, one to power it up and another for the pressure sensor (if equipped). Or possibly one of the harnesses got pinched. If the A/C is running constantly, you're probably freezing up the evaporator core which would then blow hot air until it defrosted enough to blow cold again, over and over. Give a check over the area that the work was done, you'll probably find the problem in that area.
GM Dealer Technician For 18+ Years
In the automotive industry for 20+
In the automotive industry for 20+
Re: Diagnosis
first thing to do is check your coolant level. If the coolant gets low in the system you may not get flow through the heater core.
next time the heat is not coming out hot, check the two hoses that go to the heater core. see if one is hot and one is not so hot. You could have a heater core that is starting to plug up.
next time the heat is not coming out hot, check the two hoses that go to the heater core. see if one is hot and one is not so hot. You could have a heater core that is starting to plug up.
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