Heater blows cold air?

Tiny
ANDY LIDDELL
  • MEMBER
  • 1995 FORD F-350
  • 7.3L
  • V8
  • 4WD
  • MANUAL
  • 350,000 MILES
Heater hoses both cold when engine is up to normal heat.
Tuesday, December 27th, 2022 AT 7:22 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,594 POSTS
The first thing we need to do is check the coolant level (engine cold) because when the coolant is low the heater is the first thing to stop working. If the coolant level is okay, then you could have a clogged heater core or a heater control valve that is stuck which will be located in one of the heater hoses with a vacuum line connection.

Here is a guide that will help and how to change out the heater core in the images below:

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

and

https://youtu.be/SNRb6pSwYuU

Check out the images (below). Please let us know what you find. We are interested to see what it is.

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Tuesday, December 27th, 2022 AT 11:06 AM

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