Skip the auto shop - Our mechanics make house calls

Q: Having heater problems

asked by on

The blower used to work on speeds 1 through 4 and I got a short in the wiring I fixed it in the meantime it blew a fuse I fixed it and now it only works on speeds 5 and it has no heat that comes out now and whenever you turn the little knob to change it from the vent to the floor or defrost it will not switch over to either one what do I need to do next

My car has 120305 miles.
My car has an automatic transmission.

A: Hello - this problem seems to have multiple...

Hello - this problem seems to have multiple problem sources. Whether it was the first failure or the second, the fan motor resistor pack is probably fried - given only the "max" fan speed works, and needs to be replaced. It does not go through the resistor pack. The heater control valve, which regulates hot water into the heater core would not appear to be working either. Whether that is because of a bad heater control, or a bad valve will require further diagnosis with a voltmeter. I would recommend a thorough diagnosis of the heater system performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Security light on, new key fob cannot be programed

Hello. Your key fob needs to be programmed to your car for it to work. There are a couple of ways this can be done. You could take the key fobs back to the dealership and have them program them...

Q: Rough acceleration and sputtering

The regulator is mounted to the fuel filter housing where the fuel line goes in. You may have a bad injector or two that is causing the problem you are having. The injectors on these engines had issues that are...

Q: started jeep then died

Hello. Your 2004 Jeep TJ may have a voltage regulator inside of the alternator that is beginning to go bad or a dirty/faulty idle air control valve. I suggest that you have a technician check the condition of the alternator...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.