Heater wont work?

BLACKOP555

MECHANIC
10,371 POSTS

Are you sure its the heater core hoses not the upper and lower radiator hose?

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Sunday, September 27th, 2020 AT 11:51 AM (Merged)

SONIALINN

MEMBER
1 POST
1996 FORD EXPLORER
6 CYL
4WD
AUTOMATIC
172,000 MILES

The heater in my Explorer works intermittently. It blows out cold air and the temperature gauge rises to the red, indicating that it's trying to overheat. Also the temperature gauge needle fluctuates dramatically, like a bobber in water. The thermostat has just been replaced and antifreeze was added. It is still doing the same thing. This is about the third thermostat that has been installed in the past three years. This time it is not doing the trick.

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Sunday, September 27th, 2020 AT 11:51 AM (Merged)

RASMATAZ

MECHANIC
75,992 POSTS

Try removing the thermostat and see what happens to the temperature-

Also did you bleed out the cooling system?

Above don't work do a block and pressure tests to confirm there's no combustion gas leakage.

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Sunday, September 27th, 2020 AT 11:51 AM (Merged)

HIGHTOWERTAN

MEMBER
1 POST
1996 FORD EXPLORER

Heater problem
1996 Ford Explorer 4 cyl All Wheel Drive Automatic

What could be the problem as to why my heat isn't working. I had my thermostat fixed but there still isn't not heat.

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Sunday, September 27th, 2020 AT 11:52 AM (Merged)

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

I need you to check something. With the engine running, hot, and the heater on, feel both heater core hoses to see if they are both hot.

Let me know what you find.

Joe