MudfrogK5
NAXJA Forum User
- Location
- Roanoke VA
I picked up a cheap 90 XJ Sport, 4.0, manual, only basic options except for AC. It sat for a little over a year before I picked it up. Anyway I'm having troulbe with the heat. It will only blow warm. I do not have a temp gauge, only a light that comes on when it's over heating (one of the dumbest things about this jeep) so I had no idea if it was even warming up, so naturally the first thing I did was replaced the Thermostat. That helped slightly, it went from cold air to luke warm air.
Well this past weekend I started losing a ton of coolant, it ended up my reservoir was cracked. I replaced the reservoir and went back on my quest for heat.
So from there I noticed the hose going into the heater coil was hot but the hose coming out was luke warm. I did a reverse flush on the heater coil, now the bottom hose is hot like the top hose. This helped some more, I went from luke warm air to warm air, but not hot. I read up on the coolant system for my jeep and apparently it is a pressurized system. So I burped the system at the temp sensor. Still only warm air.
My brother (who has an XJ) then told me about how he had to replace the heater valve in his, he said you can tell if it needs replacing by holding in the button on the heater valve and the air will get hot. We tried this on mine but the air actually got colder instead of hotter.
So I'm kind of at a loss, I could greatly use some recommendations on things to try.
BTW, yes the temp slider works on the dash, so it is not stuck in the warm position, but it does not completely go to cold, maybe 3/4 of the way through cold, it feels like it's hitting something. I don't think this affects the heat though, but that is just a guess.
Well this past weekend I started losing a ton of coolant, it ended up my reservoir was cracked. I replaced the reservoir and went back on my quest for heat.
So from there I noticed the hose going into the heater coil was hot but the hose coming out was luke warm. I did a reverse flush on the heater coil, now the bottom hose is hot like the top hose. This helped some more, I went from luke warm air to warm air, but not hot. I read up on the coolant system for my jeep and apparently it is a pressurized system. So I burped the system at the temp sensor. Still only warm air.
My brother (who has an XJ) then told me about how he had to replace the heater valve in his, he said you can tell if it needs replacing by holding in the button on the heater valve and the air will get hot. We tried this on mine but the air actually got colder instead of hotter.
So I'm kind of at a loss, I could greatly use some recommendations on things to try.
BTW, yes the temp slider works on the dash, so it is not stuck in the warm position, but it does not completely go to cold, maybe 3/4 of the way through cold, it feels like it's hitting something. I don't think this affects the heat though, but that is just a guess.