Heat Issues On My Mj Help Please

[Burntoast914]

So once in a while my heat works. Whn I let it run fur 30 mins or longer it tends to heat up lightly. Now when I drive it it gets warm but as soon as I slow down or come to a stop it will be cold air coming out or might stay warm if I'm lucky.

 

Thermostat was changed. old one was bent n wasn't working correctly.

 

Now I'm wondering if it's the heater core or I hear from my buddies saying it could be the heater coil?

 

Also a other buddy told me to chck the lines (antifreeze) n chck if it's warm or cold n one is hit other is cold.

 

Really need my jeep in the winter it's freezing at 5am whn I head to work. Please help me out someone

[Jeep Driver]

There is a valve at the firewall where your heater hoses enter, make sure the vacuum line is attached to the valve.

 

Or it could be the blend door is not closing allowing cold air in instead of hot air.

[Burntoast914]

Blend door? Where's that and what is that?

 

Also I believe the vacuum hoses are fine ill double chck

[AeroNautical]

Blend door? Where's that and what is that?

 

Also I believe the vacuum hoses are fine ill double chck

 

The blend door I believe is the lever that is directly controlled by the temperature slider on the dash. It runs a long wire to a lever just under the passenger footwell. You may have to take the lower heating vents out to find it. That was my problem awhile back, only ever had hot air. I reattached that lever and I get lots of both, now. 

[yxmj]

Take a couple of minutes and look at the 5 or 6 current posts on heat in this section.....go back a couple of pages if need be.....ever problem and every solution has been tossed on the table. :thumbsup:

[carnuck]

Go above the gas pedal and look for the vacuum hose going to the flap there. People kick it off quite often.