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Heater blowing cold air?

Tiny
TRUBREW1991
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 152,000 MILES
Okay, when I first bought my car, it was working great. It gets really hot really quick. Yesterday my cat started over heating and I put coolant in it have now it's blowing out rant cold air.
Tuesday, December 20th, 2022 AT 6:55 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
I would start the engine and allow it to heat up, then grasp the heater hoses to see if they are hot, this way we can see if it is a cooling system problem or an HVAC issue. Double check the engine coolant level before you begin.

Please check out this guide which can help as well:

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

Please go over this guide and report back.
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Tuesday, December 20th, 2022 AT 10:35 AM

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