Car heater not heating up?

Tiny
AHADI222
  • MEMBER
  • 2014 TOYOTA REVO
  • 2.4L
  • 4 CYL
  • 4WD
  • MANUAL
  • 60,000 MILES
My vehicle not heating up and when I check no heating button. Any assistance?
Monday, November 1st, 2021 AT 12:42 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
If the heating button is not working, then we need to start with that, however there are other things that can cause this, so here are some guides that will help with this:

https://youtu.be/SNRb6pSwYuU

https://www.2carpros.com/articles/car-heater-not-working

Basically, if when you press the heat button, and it does not turn the heat on then the module is most likely the issue.

We do not have a manual on this vehicle as it is not offered in the USA but here are the diagrams for the sister vehicle that is offered here.

You will see there is a heater relay, and we need to check the operation of this relay and if it is not the issue then the control assembly needs to be replaced.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please see the wiring diagrams and let us know what questions you have.

Thanks
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Thursday, December 30th, 2021 AT 5:25 PM

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