1996 Lumina minivan No heat

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Old 02-10-07, 08:26 AM
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1996 Lumina minivan No heat

Our 1996 Lumina van just lost heat all together. My wife tells me it happened earlier in the week but I just found out. The rear zone blower runs but only puts out cold air. The front doesn't blow at all. I can click each button and it lights up(was doing it at night so can't tell ya which ones but think I hit each one) can anyone tell me where I should look for the fan or anything else? I checked the manual and it tells me lots of things are on same fuses...pulled the ac/heat/aux one and some lights went out. I'll pull my meter out this morning but could use a little direction.
also I asked her to check the coolant yesterday morning and make sure there was some in the reservoir. She found it empty and decided to top it up a little and added the regular green stuff and the car asks for dextron only will this cause a major problem? she only added a 1/2 gallon of premixed.
 
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Old 02-10-07, 09:08 AM
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Adding specific anti-freeze is a sales gimic. Most or all anti-freeze makers have the same chemicals in them.

It sounds like maybe your control panel (knobs/buttons) is defective.

After checking and making sure ALL fuses are good, replace the control panel. The fuses for the blower motor, etc, are usually the green 30amp type. You can often find these controls cheaper in junk yards then the dealer.
 
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Old 02-10-07, 11:47 AM
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I would say check things first make sure you have power to the fan first before you go replacing things blower motors are usually on the pass side under the dash just unplug and check for power to the blower and check for ground if u have these things the blower is bad if you dont trace back and find the blower resistor make sure you have power to this in all speeds and ground most of the time the resistor goes bad not the blower or the controls and as far as the antifreeze thing all your wife did was turn the extended life antifreeze into regular that needs to be changed more often not a big deal no damage was done now you also need to find out where the leak is if you had to add to the system there has to be a leak somewhere
 
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Old 02-10-07, 01:07 PM
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2 problems...........No forced air out the front..............and no heat/loss of coolant. Round 1 takes you first to the blower motor to check for voltage with the key in the run position. There should be battery voltage at the blower motor and through the blower motor. The it's off to the resister block to see if anything is burnt or if current is going through...........then the fan control switch if all checks out to that point........
As far as the coolant leak is concerned.............Check the intake manifold/cyl heads for signs of coolant leakage from the intake gaskets........VERY common.
 
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Old 02-10-07, 02:53 PM
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Wierd and wierder. The fan was sort of working a little noisy. Picked up new one and installed. Have heat now.Turned on the rear fan and only cold air there...Is this only a circulating fan or does it actually have a heat coil?. as for the coolant leak..... welll intake is leaking. oh well guess it happens.thanks for the help all!!
 
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