Question about 2002 Chevrolet Tahoe

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I just had my a/c evaporator core and heater core replaced two weeks ago. The heater worked fine at the time. I just thought it was a good idea to change since they were changing a/c core, but now my heat doesn't work. What could it be?

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  • Chevrolet Master
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My sympathy goes to the shop. If they forgot to re-attach something it may be unreachable and they may need to take it apart again. They must guarantee the work and make good on it.
If they try and give you any BS about something else failing so they can charge you again, request to have the part returned to you have an independent party check it and if it is good or has been tampered with ....you can go from there.
good luck

Posted on Sep 29, 2009

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Posted on Jan 02, 2017

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I have a 2000 s 10 blazer heater doesnt work..but all fues are good and tried replacing swith in cab..no effect..but blower works just fine? Any ideas


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How do I replace a heater core


The entire instrument panel must be removed to access the air box under the dash. Once removed, it's a good idea to replaced the A/C evaporator at the same time. Jeeps are known for leaking evaporators and there's no reason to go through that job twice for the cost of a part. The A/C has to be recovered and recharged anyway, so you might as well fix it now.

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How to repair the heater core


Depends on what the heater core is made of.
All repair shoppes would replace the core, and not try to fix it.
Back 30 years ago, they were repairable, as they were made of brass and copper, and could be soldered.
Today, they are usually plastic and/or aluminum, and are supposed to be replaced when they go bad.
You could try some good "stop leak" in your radiator, and leave the heater on for a few weeks to get the water to circulate from the radiator to the engine to the heater, but alas, I've never had that work yet, and I have tried about 20 times (on 20 cars).
Stop leak would sure be cheaper that having the core replaced.
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My 2008 Mazda tribute has a drenched passenger side rug and insulation. I discovered it last week (December). I found the cabin filter cover was not tightly installed, I caulked around the inside of the...


Hey Marcel,
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I have a 2003 Dodge ram 2500 with the 5.7l Hemi, I notice a few weeks ago that there was a small amount of water(Not anti-freeze) that leaked onto the floor on the passenger side. It happened again last...


I don't know how the heater would be affected but water there and if it's not antifreeze from the heater core would just about have to be the condensation from the a/c evaporator because of a stopped up drain hose or cracked drain pan.

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Smoke coming out of vents


if it smells like sweet antifreeze, it is
the heater core is not he A/C evaporator core.

the core fails due to not replacing the antifreeze coolant before it goes acidic ... (not doing service here)

are you getting leakage under the dash near heater box, blower area?

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Cost and how to repair a heater core on a 1994 Volvo 850 Wagon.


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1993 taurus heater core replacement guide


This is a big job which involves discharging and removing parts of the A/C system as well as removing parts of the dash. I had the core done on a 94 Sable years ago and it was a very labor intensive and expensive job. Here are some instructions I found for a 94 Taurus which should be the same thing or similiar, but I don't guarantee that. Please note that these instructions were not tested by me and may contain errors or be incomplete in some way. For example "remove instrument panel" sounds simple but in reality is a process in itself requiring the removal of many screws. Naturally you would have to recharge the A/C and refill the coolant when done.
__________________________________________
Removal

1. Remove instrument panel and lay it on front seat.
2. Remove A/C evaporator housing as outlined.
3. Remove vacuum source line from heater dash panel seal (18529).
4. Remove heater dash panel seal from heater core tubes (refer to Heater Case Assembly).
5. Remove four heater core access cover retaining screws and remove heater core cover (18B300) from A/C evaporator housing.
6. Lift heater core and seals from A/C evaporator housing.
________________________________________________
Installation

1. Transfer three foam core seals to new heater core.
2. Install heater core and seals into A/C evaporator housing.
3. Position heater core cover on A/C evaporator housing. Install four retaining screws.
4. Install heater dash panel seal on heater core tubes.
5. Install vacuum source line through heater dash panel seal.
6. Install A/C evaporator housing into vehicle as outlined.
7. Reinstall dashboard components.

Best of Luck!

SC442299




Aug 19, 2008 | Ford Taurus Cars & Trucks

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