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Discussion Starter · #1 ·
Hey guys,

Maybe one of you can help me out. I have a 97 Chevy Astro works great, except that the heat is working wired. After the vehicle warms up, I'm getting heat, driving is fine. The problem is if I stop and idle for a period of time 5 or more minutes or so the heat gauge starts to go up and I start to get cold air instead of hot air?

I'm thinking thermostat, but I don't want to go start changing parts, unless I know for sure.

Thanks.
 

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Discussion Starter · #2 ·
Full up the coolant, bleed the system, and still same issue any ideas?
 
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