2005 Pontiac Grand Heater Runs Hot Driving First Turn On Warm Will Same Cycle

47,800 MILES
Avatar
KMAHIEU79
  • MEMBER
  • 1 POST
The heater runs hot as driving when i first turn it on, then goes to warm, and it will do the same cycle if i turn it off and turn it back on 2 mins later. At an idle it starts warm then goes to cold. My temp gauge also fluctuates between 195-215 as i am driving. Just changed thermostat, no change. Checked reservoir, shows it being to the full line.
Mar 8, 2013 at 3:11 PM
Advertisement
Avatar
HOMER1967
  • ✓Experienced Mechanic
  • 875 POSTS
the cooling system has to be bled.your symptoms are tipical of air pockets in the cooling system.take it to a shop and have them bleed it thoroughly.
Mar 8, 2013 at 5:23 PM
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.

Frequently Asked Problems for This Vehicle