'07 HHR the engine temp gauge only works some of the time when not workng still have heat but no a/c


Asked by luvmlkwag Apr 17, 2010 at 03:37 PM about the 2007 Chevrolet HHR

Question type: Maintenance & Repair

'07 HHR the engine temp gauge only works some of the time - when not working the heater still works but not the A/C. If the engine temp gauge is working the A/C works. The engine light stays on for no apparent reason and the left rear passenger door lock no longer works with the rest of the door locks.

12 Answers


It was a damaged thermostat that was causing the engine light to come on and the temp gauge to not work. The rubber on the thermostat was all shot to hell, stretched out, torn and missing some pieces. After I replaced it the, temp gauge started working again and the engine light went out after I had driven about 24 miles.

4 out of 4 people think this is helpful.

I just bought my 2007 HHR 3 weeks ago and yesterday I noticed the exact same problem. When the temp gauge didn't work the a/c didn't work either and the engine light came on and has stayed on since. About every 3rd trip the A/C and temp gauge will work. You mentioned that you replaced the thermostat and it fixed the temp gauge problem but what about the a/c? Thanks.

17 out of 17 people think this is helpful.

have had same problem with my 07 for months. codes read bad sensor&therm. replaced sensor &was told therm probably not bad because it worked ocasionally. going to buy therm now.

2 out of 2 people think this is helpful.

My oil presser gage stops working also,


never had problem with oil gauge, but replaced thermostat on 12-16 & after start&stop 3or4 times, everything was back to normal. therm rubber was all distorted also. a/c works fine & ck engine lite went out.

2 out of 2 people think this is helpful.

you need to change the sensors and for aic check the air filter. http://chevrolethhr.net/

1 out of 1 people think this is helpful.

needs new thermostat


This is an easy fix. Just did it myself in my driveway. It will take you longer to remove and re-install the lower radiator hose than it will to replace the thermostat. My advice would be to go to Autozone and spend $37.00 on an OEM hose clamp tool, and make sure you have an extra long extension for your ratchet, and of course, a 10 mm socket. The thermostat housing itself does not require a gasket, the thermostat itself has an o-ring on it, so don't buy an extra gasket, it already comes installed on the new thermostat(22.99 at Autozone). I was shocked at how quick this was to do! Save your hard earned cash and do it yourself!!


After replacing the thermostat did it also fix the AC problem?

2 out of 2 people think this is helpful.

it fix the problem but it set me back 275.00 to replace the thermostat

Scott Davis

I found out it is my thermostat I need to replace where can I find a cheaper part then at the dealership


I have a similar problem with an as yet undiscovered cause - As some of you state - both the temp gauge and the AC become inoperative at the same time - The code displayed on my code reader indicated no temperature sensor input - I foolishly replaced the sender and it accomplished nothing - going back with the code reader again when the light came back on and the gauge and AC again inop there was an engine temperature displayed on the reader so I knew the sender works - a rest immediately restarts the gauge and the AC. Whats odd is that the gauge and AC may fail but no light and no code - But even with no code pushing the clear codes button on the code reader gets it all back up and working - sometimes for a day / maybe a week / could be a month. So I am thinking cluster ?? - BCM ?? - who knows but the code is incorrect

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Looking for a Used HHR in your area?
CarGurus has 4,163 nationwide HHR listings starting at $1,995.

Search Chevrolet HHR Questions

Chevrolet HHR Experts

#1 Tom Demyan
Tom Demyan
Reputation 530
#2 Zachary Pilalas
Zachary Pilalas
Reputation 420
#3 butch686
Reputation 390
View All

Related Models For Sale

Used Chrysler PT Cruiser"
46 Great Deals out of 4,565 listings starting at $2,299
Used Chevrolet Impala"
1,465 Great Deals out of 45,229 listings starting at $170
Used Chevrolet Equinox"
1,094 Great Deals out of 54,106 listings starting at $1,450
Used Chevrolet SSR"
10 Great Deals out of 287 listings starting at $14,995
Used Dodge Caliber"
86 Great Deals out of 3,499 listings starting at $1,500
Used Chevrolet Malibu"
1,078 Great Deals out of 55,873 listings starting at $1,400
Used Chevrolet Silverado 1500"
2,101 Great Deals out of 138,016 listings starting at $1,500
Used Chevrolet Cobalt"
151 Great Deals out of 5,402 listings starting at $995
Used Ford Escape"
1,344 Great Deals out of 92,166 listings starting at $750
Used Ford Mustang"
653 Great Deals out of 42,605 listings starting at $1,695
Used Jeep Wrangler"
964 Great Deals out of 50,168 listings starting at $1,800
Used Honda CR-V"
771 Great Deals out of 56,384 listings starting at $1,495
Used Ford Focus"
1,123 Great Deals out of 72,795 listings starting at $1,299
Used Chevrolet Corvette"
277 Great Deals out of 14,851 listings starting at $3,999

Used Cars For Sale

2011 Chevrolet HHR For Sale
40 Great Deals out of 817 listings starting at $4,499
2010 Chevrolet HHR For Sale
24 Great Deals out of 665 listings starting at $3,599
2009 Chevrolet HHR For Sale
29 Great Deals out of 706 listings starting at $2,947
2008 Chevrolet HHR For Sale
21 Great Deals out of 750 listings starting at $2,800
2007 Chevrolet HHR For Sale
19 Great Deals out of 584 listings starting at $1,995