dubdub20003
SILVER Star
Funny, I had nothing to add… but was going to offer the same!
Desperate for heat
- Thread starter snowday
- Start date
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- Thread starter
- #22
Thank you for this!
So if all the wiring and the blower control thingi is ok then would you not look at the heater core? maybe its bocked and is causing this problem? not sure if the OP has the problem fixed but check this out if all else fails.. I had this happen to me on my Truck...and to see if my heater core was blocked I swapped the heater hoses position going into the heater core... Once I did that.. my heater started working. After that I just swapped the hoses back.
If your heater core is really clogged up you may have to do a heater core flush as well.
If your heater core is really clogged up you may have to do a heater core flush as well.
Hopefully you don't have a problem with the heater core.
Btw to other mudders in here.... does the heater core have anything to do with the car thermostat? Would replacing it help the heating. I don't think so but you never know.
Eyedaho
SILVER Star
Your heater core has coolant circulating through it just like your radiator, and just like your radiator it exchanges that heat from the coolant to the air. If your thermostat is stuck open and your coolant isn't heating to proper operating temperature, it won't exchange as much heat with the air flowing through your heater core, and you won't have as much heat coming out of your vents.
Ok so what @Eyedaho said makes sense. Have you checked your coolant temperature by hooking up the obd2 sensor and seeing the temperature? If you are not hitting at least 185°F then you thermostat is bad. Replace it with an OEM unit only because cost of non OEM is similar. Also buy the oring gasket for it.
Replace it yourself is easy Btw if you take out the intake air tube going into the throttle body/air intake.
Btw at least for the LC/LX the temperature of thie 4.7l should be between 185-200 in normal operation. Not mentioning that during towing the temperature may go higher.
Here is a video that shows how to replace it.
Replace it yourself is easy Btw if you take out the intake air tube going into the throttle body/air intake.
Btw at least for the LC/LX the temperature of thie 4.7l should be between 185-200 in normal operation. Not mentioning that during towing the temperature may go higher.
Here is a video that shows how to replace it.
- Thread starter
- #30
There is zero air movement. Blower is not coming on.
- Thread starter
- #31
No air movement at all. The blower does not come on.
Okay sorry barking up the wrong tree. Lol your first problem is to ensure you can get your air working.
Tell us what all have you done to verify if the blower is working. Did you hit it with 12v momentarily. To ensure that it runs?
2nd have you checked your wiring to ensure you're getting the signals from the Air vent CPU box? That should actually be easy from what I can think of to troubleshoot.
3rd there must be fuses for the AC and the heater blower. Sometimes they have multiple fuses so ensure all of the fuses have been checked.
Always start with the basics.
Would it be easier to just...
Move to Miami?
Ok, maybe Hawaii?
Move to Miami?
Ok, maybe Hawaii?
Does your engine reach operating temperature this is vital.
Do you have a voltimeter?
- Thread starter
- #36
Why? I can normally turn the blower on regardless if engine temp.
- Thread starter
- #37
Yes
So @Biga27110 is right. You still do want to answer of your engine is running at normal coolant temperature as my post indicates. Because from this you'll know if you thermostat isn't stuck. And because if you put our AC systems on Auto it takes time to bring on the heat.
But then the blower still needs to work. So have you looked at trying to 12v to the blower? What troubleshooting have you done there please be specific.
- Thread starter
- #39
I haven’t
I haven’t hooked it up to a power source. I swapped it for a new one and the new one still didn’t work.
I have 8-9 volts at the plug for the blower and I ran the tests on the controller (a member posted instructions on this in this thread) and it checked out good. I have tested every fuse I have found and they are all good.
As far as the engine temp, I have not verified that but the gauge is where it always is and I’m not having any other issues other than the blower not operating.
Hook some leads to your blower from the battery or similar and see if its working. Worth a shot to absolutely ensure the blower is working.