JeepChef
New Member
Dream as if you'll live forever. Live as if you'll die tomorrow. Wheel Hard or Go Home
Posts: 17
|
Post by JeepChef on Dec 20, 2009 4:35:59 GMT -5
ok so heres the deal i have an 01 TJ with out a/c and i was driving down the road home from work and had the heat on full blast and the next thing i know the heats gone......so i check the fuse and it good i dont know what to do and it really freaking cold
email me if you have any ways to fix it
jeepchef@me.com
Thanks
Robert
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 20, 2009 8:44:50 GMT -5
More details. Did the fan quit? Did it just start blowing cold air or is it only blowing out a certain location now? You can start by checking the vacuum line on the intake manifold, iirc that vacuum line is needed to open and close the blend door and I've heard of them loosing connection there on the manifold. If that's good, I'd start looking at the linkage at the blend door, it might not be opening up and blocking the heat from the heater core.
Mike Day just went through his hvac system, he might be able to shed some more light on the subject.
|
|
gtmud
Trail Guide
89 XJ, 95 YJ, 84 RX-7
Posts: 167
|
Post by gtmud on Dec 20, 2009 9:24:04 GMT -5
CHeck your heater lines going into the heater core, they should be about the same temp( able to touch. But if you have one that is very hot and the other much cooler, then you might be looking at a stopped up heater core, this is unlikely due to the fact it just stopped, but a possibility. More common that you lost your vacuum feed off the intake though.
|
|
|
|
Post by 87B2XLT on Dec 20, 2009 9:35:48 GMT -5
Another remote possibility is that you have some junk in the airbox and the fan is hung - but that would more than likely blow the fuse - or possibly the switch went out. You could also have a clogged inlet not allowing fresh air in through the cowl, etc. If the fan is blowing but you're not getting air from the vents, check the vacuum lines / check for vacuum leaks. Could be a line or the vacuum-operated damper(s). Ditto on the heater core as well. I would check the radiator when cold to see where the level is at. I've seen where an air pocket in the cooling system has wreaked all kinds of havoc on the heater, etc. If it's losing coolant, I'd look at your floorboards to see if they are wet - and everywhere else for coolant leaks. I doubt that the thermostat is stuck open, but anything is possible - and that would also affect your heater because until you lose airflow, your overall temp would be off. Hope you get 'er figured out soon .... been in the Winter without heat due to a bad heater core that I had to bypass until I got it fixed, it SUCKS.
Dave G
|
|
JeepChef
New Member
Dream as if you'll live forever. Live as if you'll die tomorrow. Wheel Hard or Go Home
Posts: 17
|
Post by JeepChef on Dec 20, 2009 15:00:05 GMT -5
it stopped blowing air all together ...
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 20, 2009 15:01:45 GMT -5
If the fan just quit, you'll probably want to replace the switch and resistor. AndyW just did his and can probably point you in the right direction.
|
|
JeepChef
New Member
Dream as if you'll live forever. Live as if you'll die tomorrow. Wheel Hard or Go Home
Posts: 17
|
Post by JeepChef on Dec 20, 2009 19:20:06 GMT -5
how much am i looking at  ? |
|
|
|
Post by stuck tj on Dec 20, 2009 20:37:30 GMT -5
If the fan just quit, you'll probably want to replace the switch and resistor. AndyW just did his and can probably point you in the right direction. I agree the resistor might be what I would look at if you check your connections first. Pull the switch assembly out of the dash and check that. Any smells before it died? |
|
JeepChef
New Member
Dream as if you'll live forever. Live as if you'll die tomorrow. Wheel Hard or Go Home
Posts: 17
|
Post by JeepChef on Dec 20, 2009 21:26:48 GMT -5
nope no smells just didnt work anymore
|
|
|
|
Post by 87B2XLT on Dec 21, 2009 4:09:04 GMT -5
|
|
|
|
Post by JeepCJ5 on Dec 21, 2009 15:30:24 GMT -5
Did you get this fixed? A co worker of mine had his TJ blower motor quit working Friday. When he went to replace it, it was a bad ground not the motor.
|
|
JeepChef
New Member
Dream as if you'll live forever. Live as if you'll die tomorrow. Wheel Hard or Go Home
Posts: 17
|
Post by JeepChef on Dec 22, 2009 0:46:29 GMT -5
Really I haven't fixed it yet I need to check that where would I look ??
|
|
|
|
Post by 87B2XLT on Dec 22, 2009 4:43:27 GMT -5
I thought the heater/blower/ac fan was like most windshield wipers - the switch is on the negative (ground) side of the circuit. I could be wrong on that. Easiest way to tell is if one of the wires coming out of the motor connects to a point on the body or frame, etc. Not sure where the resistor network is located, but you may want to check to see if you are getting power to it on all positions of the switch and that power is coming out of it for the motor. Then it should be a matter of tracing out and checking continuity from there to the motor and from the motor to ground. You may even want to disconnect the motor leads and check continuity from each wire to groundand from the motor case to ground. I believe the motor is supposed to be isolated electrically from ground.... if it's like most I've messed with.
Dave G
|
|
JeepChef
New Member
Dream as if you'll live forever. Live as if you'll die tomorrow. Wheel Hard or Go Home
Posts: 17
|
Post by JeepChef on Dec 22, 2009 10:36:07 GMT -5
Thanks Man
|
|
|
|
Post by pbo2274 on Dec 31, 2009 5:22:37 GMT -5
So whats up man you freezing to death or what....
|
|
?
I wouldn't just throw parts at it until you figure out which part is bad, though.... you may want to remove the blower fan/motor and see if it's just hung or if the airbox is full of junk. I don't think the resistor network would be bad, if you had it on high - that usually is a direct connection between the power source/dash switch and the motor. I'm not sure if the TJs had a relay for the blower fan or not (?)....
