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Re: I need instructions on how to replace a bad heater...
You can get a repair manual on ebay for less than the price of a tank of gas. there will be instructions and photos in it. also search youtube for videos
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check to make sure the power brake booster is not leaking, do this by starting the van and just let it idle in park and push the brake pedal if the engine stalls or surges or you hear a sucking noise under the dash then replace the power brake booster if there is none of these systems then replace the idle control motor. GOOD LUCK
You need to check the blend door on the heater box to see if it is working by hand.The door is behind the glove box near top of heater box.Make sure it is connected to its control lever
Disconnect the inlet and outlet pipes on the upper right side of the firewall (Its somewhat of a long reach but you can do it) Drain the radiator and then remove the heater core. Its inside the van located in the heater box under the passenger side of the dash board. I believe you may have to remove the inner glove box. I know that is the case on the TransPort and the Silhouette but the Lumina dash is somewhat different in style.
First thing is to chk. fuse. If fuse is ok than there is 2 other things that could be bad, like the motor burnt up, did you smell anything when it did run? Like wires burning? If you did than the motor needs replaced. If not than its the heater motor resister thats bad and needs replaced, the resister controls the motor speeds and makes the heater motor run too.
I need more info. However, if your fuel pump is not coming on, check the wiring first. Also some vehicles have a fuse under the hood for the fuel pump, usually it is a little 20 amp fuse along with the one in the vehicle. There is a relay for the pump too that might need to be checked. Where did the fire spread? Did any wires start to melt? Check the pressure regulator, it is just a diaphram inside of it, if the fire heated it up enough, it might have caused the diaphram to bust inside. Did the fire spread to the injectors? If you can give me some more detail I'm sure we can find the cheapest solution for you. Hope what I have covered helps you. I am looking forward to helping you fix your problem.
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