Skip the auto shop - Our mechanics make house calls

Q: 2007 galant es blower motor resistor or transistor

asked by on

I have the knobs for ac and heat.looks manual but I took out resistor but it looks like a transistor

My car has 90000 miles.
My car has an automatic transmission.

Your vehicle is equipped with a blower motor resistor block. It is a modular, replaceable assembly and the part is different for Galants with and without A/C systems. If your blower motor is not functioning, failure of the resistor block is a possible cause but you should test the block, and possibly other components, to be sure that you don’t needlessly replace the resistor block and, indeed overlook the real cause of the failure. If power is reaching the blower motor when the blower switch is in the on position and the blower motor is not functioning as intended then the blower motor is condemned and replaced. On the other hand, if there is no power, then the blower switch and the plug connection on the back of the switch, as well as the rest of the circuit should be inspected. When the circuit includes a blower motor resistor block, of course the resistor block has to be checked for continuity (i.e., specified resistance in ohms) at each position. If equipped with a relay in the circuit, that is easy to test and if the relay works consistently as commanded, you can assume there is no fault there. If you want these diagnostic steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a non functioning cabin heater diagnostic and the responding mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: When I turn the key the lights come on fine, but sometimes it is hard to crank up. It makes a fast ticking noise

Hello, thanks for writing in. It sounds like either your battery voltage is low, or you have a corroded battery terminal, or both. Check the battery posts for corrosion, if you find a blob of blue green fuzzy stuff there,...

Q: My right front turn signal and right rear taillights are not working.

Hello there, installing aftermarket components like the stereo do not always work out properly on your 1998 Mitsubishi Galant. When installing aftermarket radios with the adapter harness all of the wires should have a place to go and all components...

Q: Could the HTR 50 A fuse be the problem for heat/blower not working?

Hello. Yes fuses can play a part in causing a blower motor to fail. The blower motor also has a resistor that can fail and cause the same symptoms. Both of these components can be tested and replaced if needed....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...