The motor for the heater is not working - Cars & Trucks

Sounds like a bad heater switch.
Maybe loose wire that feeds the heater motor.
OR the blower resistors is making and breaking the circuit.
Possible bad heater motor. Try smacking the lower right dash panel when the heater is is in the "ON" position.

Find the heater motor first.TAP on the motor-if it goes then ,the heater motor is most likely faulty with burned brushes,inside.

Check for power to heater motor, if you have power then you will need a new heater motor. The heater motor is located under the dash on the passengers side. You can try tapping on the motor and sometimes it will start up (short term fix). There is also a resistor in behind the heater motor but normally the fan will work on one speed if the resistor is the problem.

Most of the time when a heater blower quits working it is the blower switch that fails rather than the motor. Blower switch can be accessed in the dash panel.

CHECK SEE IF HEATER BLOWER MOTOR WORKING, REMOVE HEATER BLOWER MOTOR HOT WIRE HEATER BLOWER MOTOR SEE IF BLOWER MOTOR WORKING BLOWER MOTOR FAULTY OR YOU HAVE FAULTY WIRING AT BLOWER MOTOR AND RESISTOR.

The heater not working.This problem is related to few possibilities 1) The thermostat can be faulty. 2) the heater blower motor resistor is faulty 3) The heater blower motor it self is faulty. ------------ The The blower resistor is behind glove-box on plenum.Connect the 12 volt battery directly to the heater blower motor and see,if the motor runs then its faulty resistor or thermostat.but if no motor running then its faulty motor. The thermostat is located at the top front of the engine.For easy access follow the top radiator hose.The top radiator hose goes in engine .Take that hose out and thermostat will be seen inside. --------- The thermostat and resistor are not very costly part.So you can directly replace them and see if its helping.First confirm motor is working,by directly by passing the blower motor to 12 volt battery. ------------ This will help.Thanks.Helpmech.

if it only works on hi, then it's probably the resistor. if it works on all speeds when it does work it's probably the heater motor or the relay, try this, when it does'nt work with everything on try banging on the heater motor located below the glove box, if it comes on it's the motor.

fuse blows. unplug heater blower motor turn ignition on, turn heater on, does fuse blow? if not need to replace heater blower motor

Good chance it's the resistor . Will be in circuit between switch and blower, usual locations are on ducting under dash on passenger side, or behind glove box. Locate wires coming from blower motor, and follow them back to resistor.

Have the front heater core flushed ,since there is heat to the rear the thermostat is fine so it could be plugged.If the fan works on no speeds the check the fuse for the heater fan,if it's good you neerd a blower motor.

you need to test for power at the heater motor when it doesn't work there is a heater resitor that aslo needs to be tested if you have power to blower motor and it is still not working the motor is bad. if no power go to resistor it is located in the heater box behind right side valve cover. test for power at the plug it will move from pin to pin depending on the heater speed setting if you have no power at the resistor then suspect a faulty heater module. if you need anything else let me know.