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Ask George H. Your Own Question
George H.
George H., Hyundai Technician
Category: Hyundai
Satisfied Customers: 18385
Experience:  Hyundai Gold certified, ASE Master tech 15+ years
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Heater switch stays powered runs the battery down, No leaks,

Customer Question

Heater switch stays powered runs the battery down
JA: Have you checked the coolant level? Has there been any leaking from the hoses?
Customer: No leaks
JA: What is the model/year of your Hyundai?
Customer: 2005 sonata
JA: Are you fixing your Sonata yourself? What have you tried so far?
Customer: Fan relay and control panel
JA: Anything else you want the mechanic to know before I connect you?
Customer: Runs the battery down
Heater control panel always has power
Submitted: 1 month ago.
Category: Hyundai
Customer: replied 1 month ago.
what is wrong with my car it is past 24 hours
Expert:  George H. replied 1 month ago.

Hello, I just saw your question,

Does the blower motor run when you turn the key off when the battery is charged?

This is an automatic system where you set the temperature and the system controls the blower speed to do the rest?

Customer: replied 1 month ago.
when even with key out of the switch
Expert:  George H. replied 1 month ago.

OK, under the right side of the dash is the blower motor, follow the wiring from the motor up to the blower transistor and replace the transistor. Two screws allow you to pull it down out of the heater case. Replacing this part will restore normal operation to the motor.

Let me know what questions you have about this

Thanks

Customer: replied 1 month ago.
This has already been replaced
Expert:  George H. replied 1 month ago.

Then it is the same issue, do you have a voltmeter to check the circuit and what is the brand and part number of the part that was replaced?

Customer: replied 1 month ago.
The lights stay powered on the heater control where you change it from heat. AC. Defrost
This control panel always has power even with the key off we changed it and still have the same problem
Expert:  George H. replied 1 month ago.

That is a different issue than the blower running after the key is off.

If you remove the IG2 fuse from the underhood box does the controls power down? If it does the ignition switch is the fault.

Customer: replied 1 month ago.
We will try that tomorrow thanks
Expert:  George H. replied 1 month ago.

OK, let me know what you find, the controls have a couple of power sources but the IG2 fuse is what should turn off when the switch is off.

Thanks

Customer: replied 24 days ago.
There is no IG2 fuse
Customer: replied 24 days ago.
Is it a relay
Expert:  George H. replied 24 days ago.

Hello again,

So you can't find the IG2 fuse?

Customer: replied 24 days ago.
There is an IGN2 relay
Expert:  George H. replied 24 days ago.

There is a fuse as well.

It is 30 amps and is next to the low beam headlamp relay. No IG2 fuse.

Do you have the cover for the engine fuse block?

Customer: replied 24 days ago.
It's not under the hood it is on the inside when it is removed the light still is on
Expert:  George H. replied 24 days ago.

The IG2 fuse is in the underhood fuseblock lower left hand corner one fuse up from the bottom

Customer: replied 24 days ago.
Removed and still has power
Customer: replied 24 days ago.
He removed all 30 amp and relay and still has power
Expert:  George H. replied 24 days ago.

I don't know then, I will opt out of your question as I can't help further

Customer: replied 24 days ago.
Paid for nothing thanks