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i decode that as heat works, fan works perfect and blows fast
on high.
and that A/C is dead. right?
step 2 is , does the compressor shaft spin fast.
not the pulley it always does, running.
that is 1st. if you respond ill do step 3,
I've seen this before. Mice. if small enough enter from the outside into the air intake and get into the fan and motor. The least fix is to remove the fan and motor assy. the worst is you will have to have a qualified technician remove the whole dash assembly.
ok this might sound crazy but you say you smell coolant but never said if you checked to see if it was full posible bad coolant temp sensor or no coolant passing the sensor please more info on coolant usually if low coolant fan will stay on however you say you smell coolant. If the coolant sensor is bad fan wont command on it will have a high resistance a low coolant temps and low at high temps. I would check sensor since its obviously getting hotter than half way if you dont have coolant leak the relay behind the head light by the way is a common problem I would have just changed it if its original and it grounds to body thats why it is riveted however you can bolt them. Hope this helps check for thermostat opening at right temps to.
pls. check your ac compressor magnetic clutch attached in front of ur compressor if its working/ ac clutch engage when u turn the ac switch on and disengage when u turn the ac switch off/ it normally makes a clacking sound when it engage with the rotation of ur compressor/ if its not engaging it means ur magnetic clutch is stuck up giving excessive load to ur engine thats why it overheats/ it smell burnt because its magnetic coil is fried/ or check cooling system of ur car might be that coolant is empty/ fan is not working/ radiator is clogged or thermostatic valve is stuck blocking coolant flow....
Does it smell like a dead animal? or just moldy mildew smell? If dead animal, get it out. If mold/mildew smell, treat it with an AC ventilation dodorizer.
Remove the blower motor and see what's inside the cage. You might want to wear disposable rubber gloves in case you find a dead mouse or something. You may also need a mirror and flashlight to look around in the blower opening to find the critter. After it's all cleaned out you can spray some lysol disinfectant in the hole, on the evaporator fins, and the blower cage to remove some of the odor.
Sounds like the fan control knob has shorted out. You can check the fan "blower" relay and fuse in the engine compartment but you need to make sure the control knob is good or you will keep blowing fuses and relays. If your blower fuse and relay are good, then just have the control knob checked and replaced if needed.
I've had mice in my Nissan PU and actually caught one in a trap set on the floorboard; so I know they can get inside. They also knocked some of the fiberglass insulation into the blower motor so it vibrated as it was no longer balanced. You could have a dead one in your blower. Mine was easily accessible from under the passenger side under the dash. Three screws and the motor dropped so I could clean out the fiberglass.
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