Sounds like you need to replace your blower motor resistor.
The fan will run continuously if the A/C is on or the heater is set to Defrost. If that is not the case then either the thermal relay for the fan is stuck closed or the engine is running hot.
A broken fan heater can not work and A FORD Foucs does not run
Run a new ignition switch controlled "hot" wire directly to fan motor
A used Honda Odyssey will probably run you about ten thousand dollars, depending on just how used it is. If it has under 50,000 miles, it should be about 10K.
on a 2003 Honda si the fan motor blows shen removed from car. there is 12 volts to fan . fan will not run when plugged into car. does fan sw have anything to do with this
they are thermostaticly run.
No as the heater is run utilizing the fluid from your radiator and an electric fan. Using the air conditioning does as the pump is run from a belt on your engine.
A common problem is that the heater resistor/ circuit board is defective and need to be replaced. The main symptom is that the heater fan with not run on the three low speeds but will run on high.
Check the wattage used by the block heater which should be listed on the heater. If it is 2000 watts or less then the generator will run it.
A relay has gone bad.
lithium grease, it doesnt run down