tuff99

There's probably been a thread about this but I didn't find it so go ahead and make fun of me and post a link or give some help.
I turn on the heat and it blows cold, not even the defroster is warm. I'm not Farmiliar with this stuff so where do I begin. I did recently replace the thermostat of that helps

30stones

Can you smell coolant from the vents? Like a sweet maple syrup smell?

djb383

Either hot coolant from the motor is not sufficiently flowing thru the heater core (under the dash) or the air/heat blend door (under the dash) is not opening/closing properly. Are both heater hoses hot? Gotta have lots of hot coolant for a good heater. If not, suspect a plugged heater core and/or weak water pump....if yes, suspect the blend door. Remote chance it could be both (plugged core/malfunctioning blend door).

tuff99

In class now, will check

RTorrez1

It sounds like you need to flush and back flush you heater core. Make sure that you back flush it too. Also it can take several flushings to get it clean.

The Rooster

What kind of t stat did you put in? Did you have heat before the t stat change?

tuff99

Stock t stat and no I didn't

The Rooster

You brought a mopar t stat? Ok we'll that does not matter if you had no heat before you need to flush out your heater core as stated by everyone else... What color is your anti freeze? And does your jeep run at normal operating temp?

tuff99

Flushed it. Works again thanks

RTorrez1

Good to hear it. I know that I give my Jeep a good cooling system flush every year and I have never had a over heating problem or lack of heat and the heater.

tuff99

Nice thanks for that help