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I'm at a loss guys. No clue what to do now
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I'm at a loss guys. No clue what to do now


Feb 17, 2021, 10:02 AM

Heat keeps going out in the truck. It will be hot on the passenger side and mildly warm on the driver side. Sometimes it's not hot at all on either side. Sometimes it's hot on both sides.

I've replaced driver side blend door actuator.

I've flushed the entire system twice with chemical flush stuff

I've flushed the heater core 4 times already.

I have no idea what the problem is anymore.

It's time to sell but hell I doubt I'll get what I paid for it unless I pull the same tricks those ######## pulled on me when I bought it.

Do we have a mechanic on the board?

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I like your funny words magic man


Remember when we all told you not to buy it


Feb 17, 2021, 10:03 AM

But you needed to spend money you didn't have? I member. But it was "a good deal from a good friend"

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Please forgive me, @IneligibleUser


Live and learn.


Feb 17, 2021, 10:05 AM

It can't be the heater core bad or I would have water in the floorboard.

Either I still have that old antifreeze flaking somewhere or it's another issue I can't think of

At least this has taught me a lot about fixing trucks, and how not to buy one.

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I like your funny words magic man


Just get a propane tank/heater combo


Feb 17, 2021, 10:05 AM

and make sure to keep the windows up so you keep all that heat in.

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Probably possum babies clogging up driver side duct***


Feb 17, 2021, 10:10 AM



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change the thermostat


Feb 17, 2021, 10:11 AM

I wouldn't trade the thing until its time for new tires though.

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John 3:16; 14:1-6


Yeah... about that.***


Feb 17, 2021, 10:12 AM

Also, thermostat seems to be working find based on the gauge.

Message was edited by: FBCoachSC®


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I like your funny words magic man


YES !!!


Feb 17, 2021, 10:12 AM

I be like



2024 purple level member flag link military_tech thumb_downthumb_up

Is the heater control vacuum operated, or cable operated?


Feb 17, 2021, 10:14 AM

Are you getting heat anywhere in the cab?

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It has knobs


Feb 17, 2021, 10:19 AM

Heat on passenger side. Warm on driver side. Noticeable difference. I'll flush the heater core and have really hot air for a couple of days then it goes back to really hot on passenger side and warm on driver side. Already replaced driver side blend door actuator. When I turn it to 60, it gets really cold, Turn it to 90 gets warm on driver side. So blend door actuator is working. Only thing I can think of is there is still trash somehow in the water and it's getting stuck in the heater core.

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I like your funny words magic man


Its prob vacuum operated


Feb 17, 2021, 10:25 AM

I'd guess the vacuum assist solenoid (before the blend door) has a tear or hole in the diaphragm and needs to be replaced. Or maybe the controller is broken.

Have you google searched this? IMO this has been one of the few things the internet and social media forums have actually improved in life--if there is a car (or anything) that is broken, someone has fixed it and wrote about it.

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In a post-2000 truck?


Feb 17, 2021, 10:30 AM

Guess it’s possible but I don’t think I’ve seen vacuum actuation on climate control since the 90s and maybe 2000’s relics that stayed around too long like the TJ Wrangler.

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Its probably a combo vacuum/electric.


Feb 17, 2021, 10:34 AM

I had a buddy that had an '05 Tahoe that he fixed the rear AC about 3 times in the time I lived next door to him. It was vacuum/electric--all the way in the back; hence, why it required often repair.

This is GM we are talking about, so it requires a bit of a paradigm refresh of "Why in the #### would they do THAT?"

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Fair point. Reminds me of my buddy’s old Grand Cherokee


Feb 17, 2021, 10:46 AM

He asked me to come help because the cooling fan wasn’t working. I figured we would pop on a new fan clutch if crankshaft driven, or worst case, a new electric fan motor.

Nope, on the 5.2 V8’s they had, for whatever reason, a hydraulic pump that ran the fan.

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That was such an odd thing to put in a vehicle.


Feb 17, 2021, 10:52 AM

I can't imagine the amount of engineering money they went through to do that. I just wonder if Chrysler engineers just hated electric fans? Didn't it have its own engine driven pump, too? I had a '98 GC and I remember seeing that on there. There's no way it saved any HP/fuel use.

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So, uhhhh


Feb 17, 2021, 10:15 AM

Is there a passenger side blend motor?

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If the truck had come from


Feb 17, 2021, 10:17 AM

The UK, this discussion wouldn't be needed! ;)

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Yes but that wouldn't be it. If the passenger side


Feb 17, 2021, 10:20 AM [ in reply to So, uhhhh ]

was the same warmth as the driver side then probably. but when it starts acting up the passenger side is hot, driver side is warm.

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I like your funny words magic man


On older BMW’s there was a resistor that went bad and caused


Feb 17, 2021, 10:26 AM

Identical issues. Could be the same issue here.

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It is insured right?


Feb 17, 2021, 10:15 AM

I would drive it off a bridge into the lake....Be convincing though, don't "escape" until you've been under water at least 4 minutes. Do you have a waterproof watch?

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have you tried a space heater?***


Feb 17, 2021, 10:16 AM



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"something in these hills..." -joe sherman


I just may take a bath tonight***


Feb 17, 2021, 10:20 AM



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I like your funny words magic man


Sounds to me like the


Feb 17, 2021, 10:21 AM

Vent is half closed on drivers side.

HTH.

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Did your wife leave the driver-side back door cracked?


Feb 17, 2021, 10:28 AM

Because that doesn't help things.

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Probably so


Feb 17, 2021, 10:47 AM

State trooper is a tall man...taller than the width of the car anyway if you nomsayin.

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Wait until summer to sell it, and hope they don't check to


Feb 17, 2021, 10:30 AM

see if the heat works?

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Hmm...do you have a tool bench and a rubber hammer?


Feb 17, 2021, 10:33 AM

I'd try setting your nuts up flat on the tool bench and hitting them with the rubber hammer.

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had similar issue with old jeep cherokee


Feb 17, 2021, 10:48 AM

was the water pump and all the trash in the system. Kid you not.

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Might be water pump going bad. Not enough


Feb 17, 2021, 11:07 AM

juice to push the water through effectively.

Also it's time to replace the serpentine belt. Don't think it's slipping but that might be a cause too.

At this point there's so much #### that needs to be fixed on it one just leads into another and neither are the root cause.

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I like your funny words magic man


Re: Might be water pump going bad. Not enough


Feb 17, 2021, 11:20 AM



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You have to have some spare parts you can canibalize from


Feb 17, 2021, 11:14 AM

one of the rusting hulks in your side yard.

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