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No heat

Tiny
BRANDON ADAMS
  • MEMBER
  • 2000 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 280,000 MILES
I have no heat in my SUV. I have changed the heater core both hoses were hot earlier today but it was smoking, so I let it cool down and pulled it a part again and check it out everything was together. Now I check it the vehicle is hot but hoses are cold.
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Saturday, January 20th, 2018 AT 7:20 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.
Did the truck overheat at any time? Sounds like air in the system the second time but the question is where did the air come from?

When you command heat and cold, can you hear the blend door motor working the door back and forth?

Roy
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Sunday, January 21st, 2018 AT 4:42 AM
Tiny
BRANDON ADAMS
  • MEMBER
  • 4 POSTS
No, it did not overheat at all. How would I check for air in the heater core?
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Sunday, January 21st, 2018 AT 5:07 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You cannot check it, it needs to be bled.

Remove the radiator cap and run the engine at 1200 rpm's, have someone watching the coolant level while you are keeping the engine running. Top off as needed. If it is air you should get heat after around five to eight minutes. Then top off coolant and install the cap.

Did you check the blend door?

Roy
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Sunday, January 21st, 2018 AT 5:10 AM
Tiny
BRANDON ADAMS
  • MEMBER
  • 4 POSTS
Yes, the blend door works.
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Sunday, January 21st, 2018 AT 5:12 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, try bleeding the system.

Roy
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Sunday, January 21st, 2018 AT 5:14 AM

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