2004 Chevy Suburban heater blowing cold air

2004 CHEVROLET SUBURBAN
95,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
DOUGGSF
  • MEMBER
  • 2 POSTS
when the heater is turned on to any setting it will intermittently blow hot and cold air. Watching the temperature gauge it will go from 210 degrees to 240 degrees. when the temp on the gauge is climbing it blows cold air when it falls back the 210 it blows hot air.

thank you
doug norris
Nov 12, 2009 at 12:13 PM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi, Doug. This sounds like a typical thermostat problem. Have you made sure the coolant is full? If it is, I would start by replacing the thermostat.

Let me know what you find. Remember, Doug, this could also just be a low coolant problem. (I hope)

Joe
Nov 12, 2009 at 12:22 PM
Avatar
DOUGGSF
  • MEMBER
  • 2 POSTS
Joe thank you will try that!!!!
Nov 12, 2009 at 12:29 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle