No heat winters coming🥶

[Cuttysup7989]

Can anyone help me to resolve my no heat issue

I drained my coolant from my 305 5l replaced my heater core , thermostat and heater valve. Cant seem to figure out why no heat is getting in the cabin. Blower motor is working just fine and resistors are ok. A/C is in good shape also. Could it be temperature sending unit ?

 

[fleming442]

No, the sending unit doesn't control heat. Is your blend door working?
It could be an air pocket, too.

 

[GuysMonteSS]

Did you install the thermostat correctly ?? It is possible to install it upside down.
If not that,it may be a faulty 'stat.
Here is a youtube link that shows how to test one;

I am assuming that you have the correct temperature thermostat,probably a 180 degree F.
Guy

 

[pontiacgp]

how hot is the return line from the heater core?

 

[Cuttysup7989]

Thea

No, the sending unit doesn't control heat. Is your blend door working?
It could be an air pocket, too.

the blend door is located behind the glove box not to familiar with that part ?

 

[Cuttysup7989]

how hot is the return line from the heater core?

Both are hot to the touch

 

[Cuttysup7989]

It

how hot is the return line from the heater core?

its pretty hot i cant touch it continuously

 

[olds307 and 403]

That sounds like the blend door. My 88's heat sucks but still has some and my blend door works, just another marginal thing on this car.

 

[Cuttysup7989]

T

Did you install the thermostat correctly ?? It is possible to install it upside down.
If not that,it may be a faulty 'stat.
Here is a youtube link that shows how to test one;

I am assuming that you have the correct temperature thermostat,probably a 180 degree F.
Guy

Thanks alot yea im sure it’s installed correctly ill check it to see if it’s faulty

 

[Clone TIE Pilot]

Could be a weak water pump or a slipping belt.