Sub-Zero BI-48SD Control Board & Display R&R

[@edkirsh2277]

Great video, thank you. My BI-42UFD display went out and both fridge and freezer stopped cooling yesterday, tossed a ton of food😢… believe I need to change the control board (I believe 7021750) then reprogram and, most importantly, add a surge protector!!! Am I on the right track? Any specific surge protector u would suggest for the small space next to the condenser? Thx again!

[@SubZeroSpecialists]

@@edkirsh2277 any surge protector will do. 7021750 is not a good number for the control board

[@edkirsh2277]

@@SubZeroSpecialistsThx for your reply! That was the number listed for the main control board on the wiring diagram. I’ll obviously double check with the parts distributor but I think I’m likely going to have a certified tech do the repair anyways so I don’t have to mess with the programming. Your video makes it look easy so that was tempting!

[@mohnewyork1082]

Please need help I replaced a new control board for subzero bi-42s and seem everything works but I didn't reprogram it does that effect the refrigerator in the future?

[@SubZeroSpecialists]

@@mohnewyork1082 yes

[@mohnewyork1082]

@@SubZeroSpecialists thank you I will come back and do it

[@edkirsh2277]

Hi again, another Q. So I had the control board replaced today and it’s working perfectly BUT the freezer drawer now is a bear to move. The right sided glide takes a lot of force. Is that common bc we let it completely defrost and freeze again? Do I have to now have the glide changed or is it possible to try lubricating w/ dry silicone lubricant or other? Thx!!!

[@SubZeroSpecialists]

@@edkirsh2277 it may be frozen, try shutting the freezer off for awhile and use a hairdryer to warm it up, then try the drawer.

[@justfornow2753]

Thanks for posting this - is the wiring essentially same for BI-36U? And when everything seems to be working fine (including the digital display) other than the the keypads becoming completely nonresponsive to touch, would the necessary first step be to go ahead replace the keypad panel assembly before wondering if there’s anything wrong with the control board? I don’t know how to enter diagnostic mode without using the keypads and wonder if the only step needed to address this entire issue is just to replace the keypad panel. I’d be appreciative of any advice you can offer!

[@SubZeroSpecialists]

@@justfornow2753 if the keypad is unresponsive then change that first. Do a hard reset first first by disconnecting the power cord or shutoff the circuit breaker.

[@justfornow2753]

@@SubZeroSpecialists Thank you for that quick reply! Turning the circuit breaker off didn’t seem to make a difference so I’ll definitely try replacing the keypad next. Do you think there’s a really good chance this will be the only step needed, given that the digital display itself fine? Or can other components (like the control board) interfere with the keypad somehow, even when everything else seems fine?

[@SubZeroSpecialists]

@@justfornow2753 yes the control board and display work hand-in-hand, it’s hard to say.

[@justfornow2753]

@@SubZeroSpecialists Okay, thanks for clarifying that.