Question about 2000 Mitsubishi Eclipse

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Heater nope, thats not the problem. ive turned that all the way on high for the heater and still no heat comes out. i checked the fuses and see if anythings clogged, but still found nothing. winter is coming around here soon and i def. need help with this problem.

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If the rheostat (variable resistor) is open on all setting on the hot side it will not matter where you put it. All the way on high or all the way on low it would not understand that its on hot.

Posted on Aug 15, 2008


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Chevy astro

2 fuses to check, Kevin: in the instrument panel fuse block, 20 amp fuse #12, Htr-A/C. In the under hood fuse block, Frt HVAC fuse, 30 amp.

The new resistor you put in, was it called a "Blower Motor Resistor and Relay Pack" ? It appears there is a relay there with the resistor, but appears to only be used with htr on high speed. However the low speed wiring is also routed through this relay. If it was the Pack you put in, guess that is not an issue.
In the Heater and A/C Control Module is the blower switch. The power in to the control module is a brown wire (from the #12 fuse in instr. panel). With key on should be hot. It appears the brown wire goes to the mode switch and then to the blower switch. Check for power in, and check continuity of both switches. Or check if blower switch has power to it, then check for continuity in it-it should have continuity in all speeds.
If all is good so far, you need to check if blower motor ground is good.
Here can be found a wiring diagram for your Astro. Look for heater controls under the system called "HVAC". Every wiring diagram and TSB for the Astro (or any make, model) can be found here:
Good luck.

Jan 04, 2014 | Cars & Trucks

1 Answer

2004 GMC Sierra drivers side seat heater turnes on and off by itself

The seats are powered by a 30amp breaker which includes the circuits for the power motors.
The signal from the control switch goes to a door module then to a memory seat module, then to the heater elements.
It may be easier to disconnect the heating element for now, repairs will need a shop manual to test and trace the circuits.

Apr 29, 2013 | Cars & Trucks

1 Answer

I have no heat in my car

check to see if you've blown a fuse. In most cars the fuse box is right near the driver's seat, usually somewhere in a corner under the dash. they're little things so use those tweezers that are in there. the heater should be one with a high value. I have an assorted bag of these in my glove compartment. Easy and quick to fix it you've done it before. Your owners manual will tell you where that fuse is. Also, many cars label the holes where the fuse goes as to what it protects. Some of the little box covers have diagrams on them. You'll need that little flashlight.

Mar 18, 2013 | Cars & Trucks

1 Answer

I cannot use my heat or A/C when turned up on the high. What could be causing that? and how would I go about fixing it?

Hi, Turn off AC and see if there is actual heat coming out of the heater.
Check duct work that they are not blocked or broken. Check heater core for leaks and blockages. Check radiator thermostat and/or replace. Hope that helps.

Dec 20, 2011 | 1994 Pontiac Bonneville

1 Answer

I'm looking for the fuse that goes to me heater. the fan comes on but it blows cold air.

the fan priveds air circulation, not heat. If you have power to the fan, you're good in the fuse department.
As for no heat - did you check the coolant level?
Any check engine lights on?
Have you added anything to the radiator to prevent leakage? (If so the heater core could be clogged or other obstruction in the supply lines to/ from the engine cooling system.)
Best regards

Nov 14, 2011 | Cars & Trucks

2 Answers

My heater fan will not come on, fuse is ok and all the lights come on the dash

May just be a blower motor. If you can access the motor, turn the heater on high ang check for power at the motor. If there is power, it is the motor that is the problem.If there is no power at the motor, you will need to check the fuses If they are ok, it will be a wiring problem.

Nov 21, 2010 | 2000 Audi A8

1 Answer


you need a new blower motor
I had same problem

Jan 11, 2009 | 1992 Oldsmobile 88

1 Answer

Heater control only works on high

You need a blower motor resistor,and the heater blower motor should be checked for high amp draw. check Napa for the part or go to Dodge..prpbably about 60.00 dollars.

Dec 19, 2008 | 1996 Dodge Caravan

3 Answers

Heating Problem w/2000 Plymouth Breeze.

Sounds exactly like what my mom's car was doing as for the blower only working on high. It was the resistor... I assumed it was the climate controls and replaced them but it didn't change anything then i thought that i must be the blower motor and replaced that too but it turned out to be the resistor which is under the dash on the passenger side of the car.

Nov 10, 2008 | 2000 Plymouth Breeze

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