Temp gauge & AC stop working and sometimes the oil gauge drops to zero.

Tiny
SADAKA
  • MEMBER
  • 2009 CHEVROLET BLAZER
  • 4.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 83,000 MILES
Hello,
I have a 2009 trailblazer, Temp gauge & AC stop working and sometimes the oil gauge drops to zero. Once technician RESET from comp or when I remove the battery cable in order to reset, it becomes ok but again same thing happens after few days.
Please help me to resolve this issue.
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Saturday, October 10th, 2015 AT 12:23 AM

7 Replies

Tiny
HMAC300
  • EXPERT
It will have to be scanned for codes to see if it's a control problem in hvac or an a/c problem like freezing system up due to moisture in system. You may have a dash going bad or a body module causing the problem for the gauges.
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Saturday, October 10th, 2015 AT 6:15 AM
Tiny
SADAKA
  • MEMBER
Thanks dear for your replying,

I do not think the problem is in the HVAC system, the AC stop working because the temperature drops to zero and as you know when the temperature of car is zero (cold engine) the AC does not work. So the problem of AC is clear that because the temperature become zero.
So my problem is why the temperature gauge drop to zero, and sometimes also the oil gauge, and after I reset the system by removing the cable of battery, the problem disappear and come back after driving for a few time.
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Saturday, October 10th, 2015 AT 2:23 PM
Tiny
HMAC300
  • EXPERT
Do what I said in first reply it needs to be scanned for codes. If the tech reset it then there was a code that he never told you or you decided not to fix
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Saturday, October 10th, 2015 AT 3:31 PM
Tiny
SADAKA
  • MEMBER
Okay dear, I will do it today and will inform you what will happens.

Thanks a lot
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Saturday, October 10th, 2015 AT 10:47 PM
Tiny
SADAKA
  • MEMBER
Hello,

I did the scan as you advised me, he found that the ECT sensor (energi coolant temperature sensor) should to change, I changed and next day the problem came back. :(

what now!
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Wednesday, October 14th, 2015 AT 10:33 PM
Tiny
HMAC300
  • EXPERT
Then you either have a short in the wiring or the cluster is bad and needs to be rebuilt.
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Thursday, October 15th, 2015 AT 5:56 AM
Tiny
SADAKA
  • MEMBER
I changed the thermostat and till now it is okay, I wish the problem has solved.
I will inform you for any news.

Thanks
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Friday, October 16th, 2015 AT 9:41 AM

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