I have a 89 jeep xj and i have a heat issue, the heat will get a little warm but not hot. So i backflushed and flushed the heater core several times, i made sure the blend door was in the right position, the one thing i did not change was the thermostat.. Idk if that will affect it but i was wondering if there would be anything else i could check or do to solve this problem?? Thanks

 

I had little heat in mine for the longest time. The gauge was happy and both heater hoses were hot. What to do? I ended up pulling the blower motor off and found the wheel on the blower motor along with the heater case plugged with insulation. Got it all free and it's total nirvana now.

 

I checked the blower motor it was perfectly clean were the fan spins..

 

Get us a temperature reading from the inlet and outlet hoses that run into the firewall and go to your heater core. The difference in Temps will go along way in troubleshooting

 

I did the comparison with my hands they both were ferly hot and felt the same temp, i can get an exact temps on them tomorrow.

 

That'd be much more useful. Let us know bud

 

i figured it out! I pulled apart the thermostat housing and found that there wasnt even a thermostat there! Who pits together a thermostat housing with out the thermostat!?! So that explains my problem! Thanks

 

awesome! If you haven't gotten another thermostat yet I recommend a Mopar 195 tstat. They are a little more costly but are proven to be much more reliable. Just don't use a failsafe tstat. They are known to fail open almost immediately

 

i got one already.. And thats the exact ine i got!

 

Do u have a temp gauge? What was it reading (before the stat install)?

 

Expect your gas mileage and power to improve now that your rig will reach operating temperature.

 

Good. Your jeep is already thanking you!

 

it was going up little to none! Now its reaching 150 and a little higher.

 

That's still too low.

Ditch the heater control valve next time you have a chance.

 

If u installed a 195 stat and "it's reaching 150 and a little higher", something is still way wrong.