Hvac solder fix question
Thread Starter
Instructor
Joined: Apr 2015
Posts: 100
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From: Milwaukee Wi
Hvac solder fix question
Hey guys, so I had the typical no backlights/no function out of my hvac panel. I performed the re-solder of the 8 241 resistors and regained the lights but still no function. All the buttons work but blower fan isn’t working. I can see it adjusting from high to low on display but nothing is actually working for heat. Looking for suggestions. Does one of those 241 resistors control the function? I’m going to read codes tonight and check fuses. I do hear some clicking in the dash. Just wondering where to go from here. Thanks!
Thread Starter
Instructor
Joined: Apr 2015
Posts: 100
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From: Milwaukee Wi
The display has been out for a year or two the controls didn’t do anything when the screen went out. Everything used to work. That’s why I’m wondering if the resistors have anything to do with the blower motor working. I’ll check fuses and codes later tonight. I just assumed when the screen went dark that the controls wouldn’t work either
Thread Starter
Instructor
Joined: Apr 2015
Posts: 100
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From: Milwaukee Wi
Checked all the fuses. Pulled #27 out for 60 seconds. I’m getting a BO333 air temperature circuit and BO363 left actuator open with an Historic H on that code. Not sure how to solve the issues since every thread about these hvac problems are different.
Last edited by BeagZ; Apr 22, 2021 at 08:57 AM.
Melting Slicks
Joined: Nov 2017
Posts: 2,306
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After I did mine my controls also didn't work. It was one of the fuses, be sure to check them all. I believe my issue was one in the passenger footwell, not engine bay. IIRC there are 3 total that could affect it, make sure you look at the fuse diagram carefully.
Thread Starter
Instructor
Joined: Apr 2015
Posts: 100
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From: Milwaukee Wi
I checked footwell fuses #18 and #27 I didn’t check under hood
