okay so when i drive and my heater is on im average 180-190 which is good. when im at idle and my heater is on only the past 2 days has it started but itll go as high as 229 from what ive seen.. what in the efff? a chevy service advisor told me to check my relays. no coolant leaks. and coolant is still a nice color. helpppp!


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Check your thermostat. It may be sticking. Remove it all together and if the problem stops, go buy a new on and reinstall.

 

so when you drive and air is flowing through the radiator it's 190 and when you sit still and no air is going through the radiator it's 229.

flip on the defroster, does it go down?

 

Your thermostat might be bas as stated already... Or ur fans are not coming on. Best way to check is by turning ac on with defroster, on high, like stated also. If u see ur fans coming on and temps not dropping, it might be ur tstat

 

fan does come on. and only with the heat. AC at idle is fine


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So you're saying the fans only come on at idle with the heat or A/C on?

 

the fan came on for AC at idle. didn't think to try heat. may be a bad relay


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or temperature sending unit whatever the might be and where ever that might be.

 

If fans came on and kept temp down then u should try replacing the tstat...

 

Um, if the fans did not come on automatically with the temperature, and did come on when he turned on the AC then the thermostat is doing it's job. It's staying open allowing the fans to cool the coolant as it passes through the radiator. The question is why are the fans no coming on by themselves.

 

^ this

sounds like a temp sensor to me.

 

coolant level is low or thermostat is sticking makesure the coolant level is okay if it still does it buy a
tstat cheap and very easy install

 

^ then why arent the fans on at 229?