has never overheated, yesterday evening the temp. gauge has stopped working, does not show temp.??? checked the factory does not show a fuse for the gauge???

 

Thermostat? Does the digital display show "-- --" for the temp? If it is the thermostat sticking open, it will eventually throw a P0128 code and disable the A/C at the same time. And the condition will be intermittent.

 

it is showing code p 0128, my mech. wants $175.00 labor plus parts.

 

I have tried to find someone posted on changeing the thermostat but cannot find it???

 

What year is the HHR and how many miles???

 

and if its not under warranty......... https://www.chevyhhr.net/forums/how-tutorial-library-21/how-save-%24350-00-thermostat-replacement-2-4l-p0128-24493/

 

2006 2lt 60,246 miles

 

Took my HHR to my mech. the temp. started working, mentioned about the temp. sensor he saud no-way, his mech. did some testing said it was the sensor, the part will be in an hour parts for the sensor and labor $100.00 6thanks to this forum, all the answers are here.

 

Jay if that doesn't fix it put a thermostat in it.

 

$0.37 says it's the thermostat. But do keep us posted. Good luck.