Climate control recirculation button not working right after adding leds to board

[benjaminblazer]

After I changed leds in my climate control for some reason everything works fine but the recirculation button. Will come on automatically when starting the car and can only turn off by going into defrost mode. Then cant turn it back on at all. Not sure how changing the leds would affect this but after inspecting the board everything looks fine. (Attached pictures)
Any advice would be great, thanks for reading.

 

[Blckshdw]

That's a headscratcher for sure. I agree, changing out the bulbs for LEDs shouldn't affect the button control functionality. Maybe while you were working, something got onto the contact pad? That's the only thing I can think of. Maybe swab it with some alcohol, and hope that's all it is.

I've never seen LEDs like those, for my own curiosity's sake, what are the specs on them?

 

[Mooseman]

Maybe check for continuity between the two contacts of the pad and/or the termination points of the traces for them.

 

[Mooseman]

Well, this is embarrassing, I can`t edit my post. Check for a short between the two contact pads.

 

[TJBaker57]

@benjaminblazer

Do you have a scantool that can talk with the HVAC module? How about one of those inexpensive Bluetooth/WiFi OBD2 adapters, the kind used with apps like Torque Pro?

The status of the recirc button can be checked that way. Easier with a scantool that shows live data but there are ways to do it with the little OBD2 adapters also.

(EDIT: Just checking edit feature)

 

[benjaminblazer]

That's a headscratcher for sure. I agree, changing out the bulbs for LEDs shouldn't affect the button control functionality. Maybe while you were working, something got onto the contact pad? That's the only thing I can think of. Maybe swab it with some alcohol, and hope that's all it is.

I've never seen LEDs like those, for my own curiosity's sake, what are the specs on them?

Yeah I went back in and scraped anything thay could have been touching it. What specs you talking about? Here's a link to them though:

Gauge Cluster Red LED Conversion Kit for 2003 04 05 06 GM Trucks and SUVs DIY | eBay

Our easy DIY Kit contains: 12 cube LEDs, needle removal tool, detailed instructions with pictures, polarity diagram and tech support if you need help. The LEDs are a deep and dark red, like oxblood red.

ebay.us

 

[benjaminblazer]

Well, this is embarrassing, I can`t edit my post. Check for a short between the two contact pads.

Will do thank you.

 

[benjaminblazer]

@benjaminblazer

Do you have a scantool that can talk with the HVAC module? How about one of those inexpensive Bluetooth/WiFi OBD2 adapters, the kind used with apps like Torque Pro?

The status of the recirc button can be checked that way. Easier with a scantool that shows live data but there are ways to do it with the little OBD2 adapters also.

(EDIT: Just checking edit feature)

I have one, not sure if it has that but going to check tonight, thanks man.

 

[TJBaker57]

I have one, not sure if it has that but going to check tonight, thanks man.

If it has the live data function the button press is a momentary parameter. It will show when pressed vs not pressed.