A/C and Heater

Reader Question: My air conditioner is not cold enough at idle sitting at a stop sign, but gets colder when I get on the freeway. Is this a sign that my compressor is weak? Thank you, Bill Dear Bill, Let me explain in layman’s terms how the air conditioning (AC) system works and what could […]

Austin, my wife was told today that the heater core is leaking antifreeze inside her car. We can smell a faint odor when the heater is on high, and I have been adding antifreeze to the radiator every week or so. The dealership wants to charge us an arm and a leg to replace it. […]

My air conditioner blows only hot air. My mechanic has put Freon (whatever the new chemical is) in and says that the compressor works, but I need the “box” under the dash repaired or replaced. The price he is quoting is very high. Another mechanic quoted a price that was half that. Can you give […]

I had a new heater core put in my car and now I have no heat. I have bled the system, replaced the thermostat, replaced hoses, pressure forced water through the heater core, you name it I think I have done it. I can get heat for a time but as soon as the car […]

My van sometimes will not heat at all for over 15 miles. The temperature gauge shows correct temp. It switches from defrost to ac and all that but no heat.All of a sudden it starts heating correctly. Can you help Please Hey there See if you can help narrow things down for me. Feel the […]

The heater fan in my car runs only in high speed even with the ignition shut off. I pulled the 30 amp A/C fuse under the hood to shut it off. Is there a relay and if so where is it located? The auto parts store shows 2 different relays for the heater fan. Thanks! […]

Hello, thanks alot for all your help, I have an S10 truck with a v5 compressor that I just replaced. The old one said it took 6oz of oil, do i just put it into the suction side only? I noticed the v5 compressors have a bolt on the bottom if u take it off […]

I am hoping you can post an answer to this weird situation… My Chevy Avalanche (with the fancy dual climate control digital display) blows 140 degree air out of the vents whether I have it set at 60 or 90 or anywhere between and also whether I have the air conditioner compressor on or off. […]

My wife’s air conditioning light, “Air conditioner shut off to prevent engine damage” comes on the dash randomly, even when the air is off. The blowers all come on and hot air is circulated. The system will not shut off when hitting the “off” button on the dash. The Cadillac dealer here repaired it three […]

Hello, Austin, I came across your website when I was looking for answers to what to do about an older vehicle my husband wants that has a broken A/C. I have heard that one cannot get a shot of Freon anymore. Supposedly, one has to replace the A/C or some such thing. I don’t want […]