I was warming up my car and I had the fan on high (4), everything seemed to be going ok then after I got going, I couldn't hear the fan anymore. After this happened I was thinking that it would kick in or something but it didn't. What I did find is that the fan still worked when I had it set to one (1), blowing minimal air. Is my heater screwed? Or is it a fuse? I'm clueless when it comes to these things...and it's probably the coldest day so far this winter.
It sounds like you blew the resistor. A resistor is usually in place to prevent fire. If you did not blow the resistor it probably is a fuse. Check for this problem under recalls for that particular model year.
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first thing to do is open the radiator cap (when cold) if you have one, other wise look in the recovery bottle and make sure that it is half full of coolant. if full, start the engine and let the engine warm up to normal temp the heater on and on max temp and max fan control. watch the temp gauge and make sure the temp goes to the normal operating area and does not overheat the engine. if temp is ok and you have heat that is hot as normal then everything is ok.if no heat and temp is to high then thermostat maybe bad? if engine temp is ok and no heat then you may have blockage in the heater core and or hoses
The stuck door could be the problem. I had that happen on a Dodge sedan I once owned. I don't remember how but I got into the system and discovered a door that was just flapping back and forth thus giving me alternating warm air or no warm air at all. It might have been that the cable had come off where it was fastened to the door.
If one of the hoses to the heater core warm and the other is cold then the heater core is restricted still. Try disconnecting the hoses at the core and flushing to core with a hose go from one side to the other you can likely clear it out and save it. Also check the radiator cap and radiator it sounds like the system is not holding proper pressure. If this is a 4.3 they have a vary large cooling system and the radiators are knowen to have problems not holding pressure they are leaking and you can't even see it. It leaks in a fine mist and is despursed under the vehicle when driveing . For now i think you can save the heater core but it sounds like you are going to have to do a total mantintance on your colling system when the weather allows
What is your fan doing? Take it out for a spin and warm everything up. Park it in the drive and look at the fan right behind your radiator. If your fan is not spinning or cycling that's your problem. If your fan is spinning then my question to you is:, "Is your van overheating? And how do you know?" The gauge can be wrongor something else. Sorry if this didn't help.
um...strange ...engine temp reaches 210 before thermostat opens and lets water circulate ..fans go on before that normally..180 or so..hot air from heater going to cold air? strange...could you elaborate for me /us?
If fuses are good then you need to unplug the blower motor connector and check to see if you have power going to it. From the previous noises you were hearing it sounds like the blower motor has failed.