Heater worked great prior to changing Cab Filter today. Said nest material must have dropped down into fan.
Yes they can do that
SOURCE: Heater fan only works on high speed 4.
sounds like the switch is bad. Test the power coming in to the connector and use jumpers to get the fan to operate at all 4 speeds. if it works then it the switch.
SOURCE: Heater won't heat in cab
if the inlet and outlet hoses are getting hot to the heater core then the problem is the air temperture control blend door actuator in the heating/A/C ducts, this door directs air flow either across the heater core or the AC evaporator or mixes the 2 air flows for a desired temp at the outlets, hence the name blend door, to change this part u must remove the dash assembly.
SOURCE: 1985 honda prelude heater blower fan/fuse? problem
yes there is a fuse
what kind of nest? did something chew through a wire?
could be under dash or the fuse box under the hood if you still have it check the owners manual in the glove box dont jump steps and just replace the fan could be fruitless
SOURCE: 1997 F150 heater problem
your problem is caused by the air temperature control blend door actuator motor being defective, the little motor moves the door that gives either hot air or cold air or a blend of the 2.
SOURCE: 89 Honda Accord Heater doesn't blow air at all
sounds like the blower motor, Get a test light and hook it up to the wires going to the motor this will tell you if power is getting to the motor . Hopfully it is , Just pull the panel off on the pasangers side under the dash and you can see the motor . It's easy to change and should fix the problem. If you get no power it check for power at the switch on the dash . It could have gone bad !!
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