2020 Chevrolet Blazer · symptom sheet
A/C blows warm or the compressor fails
- 43owner reports
- 55,580median miles
- $1,400median quote
- 0involved a crash
Newest report Jun 23, 2026 · checked Oct 2, 2026
43 of the 219 complaints on this car describe A/C failure. Only overheating is reported more often on this car.
Tick what matches of 43 reports
A/C failure on other Blazer years
No other Blazer model year has enough reports of A/C failure for a sheet of its own. See every Blazer year.
What this problem usually is
Most A/C complaints start the same way: the fan still blows, but the air coming out of the vents is warm or only a little cool. Some owners get cold air that fades after a while, and others hear a noise from the compressor before it quits. It's rarely a safety problem on its own, which is also why it seldom gets a recall.
What got replaced
Few of these reports name the part that was replaced.
Recalls and investigations
No recall on this problem covers the 2020 model year as of Oct 2, 2026.
What owners paid
10 of the 43 reports quote a price. Each dot is one quote. The middle half runs $800 to $3,500.
When it happens
The middle half of failures fell between 49,663 and 65,000 miles, from the 11 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 2 service bulletins or notices for the 2020 Chevrolet Blazer that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
PI to help diagnose A/C concern
This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air.
What owners wrote
“This is what came up on my screen.Steering wheel assist reduced.Drive with care. My hot and cold gauge drop to C and stayed there for about 4 days and my a/c was blowing out hot air. I was told a lot of these Suvs have done this.”
Filed Jun 3, 2026
“The temperature gauge does not work, it stays at cold. The heater does not work unless the car is moving. AC does not blow cold air at all. I get a message that says âsteering assist is reduced. Drive with careâ. There are a lot of people online with the same complaints on these vehicles”
Filed May 26, 2026
“Engine fan stuck on high, air conditioner does not work, temperature gauge stuck on cold, driving assist warning light on.”
Filed Apr 20, 2025
“Chronic code P0128, causes cooling fans to go on high, AC doesn't work and steering assist reduced. GM calls for the thermostat to be replaced, at the cost of $1400 at my local Chevrolet dealer. Worked fine for two months then code and issues come back. Online forums are full of people with the same problem. Clearly there is an issue with these vehicles with the 3.6l motor.”
Filed Mar 16, 2025
Should you keep driving it?
This page can't tell you that. 0 of 43 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Taking it to a shop? How to describe this problem so it gets found
Other problems on this car
- Engine overheats or leaks coolant 48 reports
- Power steering cuts out or goes heavy 35 reports
- Check engine light or misfire 35 reports
- "Shift to Park" or "Service Shifter" warning comes on 30 reports
- Infotainment, screen or backup camera fails 29 reports