SpitFire

Hey guys,

The engine is NOT overheating, but the gauge will only float just a hair and no heat out of the vents. The blower is working great btw.

Start off with what has been replaced

Replaced/tested

Thermostat x2
Temperature Sender/Sensor
ECM
Hoses to/from Rad to engine
Checked fuses all seem good

I'm at a loss currently. I'm guessing maybe the heater core at this point? or Ambient Air Temperature Sensor?

SpitFire

temperature sending unit...... I looked on the forums for an answer and nothing. I google it and boom! sends me to an older thread right back here lol

OverlandZJ

Sounds like a clogged heater core.. check the hoses, see if one/both are warm.

SpitFire

It was the temperature sending unit. I didn't realize it was there. Cleaned it off and the gauge and heat work great now.

Willys55

Temp sender unit only reads temp, not related to the heat at all......,but in any case glad you have it working for you

SpitFire

I don't know. I cleaned it off and let the Jeep run. Temp hovered back to normal and heat started working again. Think it may be talking to the computer? That's the only thing I can think of. mechanically nothing other than senors/sender was touched.

Willys55

more than likely that air bubble in the heater core made its way out while you were running it to check your temp gauge performance

SpitFire

most likely, just odd it would do it after I cleaned that sender after months of not realizing it was there. Whatever happened, it's working before winter