Jeep Wrangler Tj 2.5 running cold

[Aaronrich17]

Hello all, I have a 1999 Jeep Wrangler 2.5 and its runnig cold. During the summer I didn't have a problem with this, but now that it's starting to get cold I'd like my heat to work lol. Replaced the thermostat last year, flushed out the rad and heater core. Any suggestions?

 

[JPNinPA]

If the engine is up to temp and the air is cold either your blend door is broken or your core is blocked.

If your engine is not at temp within a mile or two your thermo is stuck open. They sometimes fail early. Don't by fail safe because they do work as they say. They fail. I use Stant and drill a small hole above the valve to aid bleeding.

 

[Aaronrich17]

Thanks man I'll give it a try and let you know the results!