Question about Jeep AM/FM Cassette with CD Changer Controls - Upgrade Swap
I have a 1998 Jeep Cherokee and I have no heat. We replaced the radiator and the thermostat and still no heat. It used to have very good heat within the last couple weeks it started having no heat. Please any suggestions would really help!
Hi if the heater fan is working properly and blowing into the jeep then that rules out the fan being the problem and depending on how the temp switch works it will either be cable switch ie when you turn the dial it pulls cable adjusting the flaps near the heater rad allowing hot air in or blocking it off so it just let cold air in from the outside.
Now if its an electronic switch this could be your problem you can take switch out and clean the contacts
Is the loss of heat the reason you changed the rad and thermstat or has this problem come after you changed the rad and thermstat.
If the problem occured after you fitted rad and thermstat then your problem is 100% blocked air in water system if this is the case then you need to bleed the system getting all the air out.
What you need to look for is plastic screws attached to any water hose dont undo these with engine hot as the pressure will force water out burning whoever is doing it with cool engine undo these and let any air out.
If air isnt the problem then you will need to replace the heater switch one way of checking for air is by touching the water pipes when engine has been running and see if their is any temp differance anyway its worth bleeding the system anyway just to rule this out.
The heater works off seperat rad that is fed by the main rad the heater rad is located towards back of engine towards the bottom you will see two water pipes running into the bulk head these are the feed and return pipes for the heater rad if you get the engine warm enough to open the thermostat for few minutes then touch both of these for temp if it is an air isuue then one will be cooler than the other let me know ok
Posted on Feb 12, 2008
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