There is no reset I am aware of, it should just work. As it is reading too low, check for a high resistance, use some contact cleaner on the connectors, see if that fixes it.I got from ebay . In gm original parts. Do not have number, I disposed of bag.lol. temp reading now is working but plunges to - degree in the morning when was setting at 75 degree. I haven't disconnect ed battery yet and drained residual current. Should I ? Will that reset?
Glad it worked for you. I carry a small can of contact cleaner in the rear stowage; the XLR (like many of today's 'latest and greatest') depends on its electronics and problems with connectors is the #1 cause of strange behaviors. I too kick myself for forgetting to check things where I really should know better.Purchased a new one . Installed didn't work properly,but different from the old one. Finally broke down and cleaned connection and now working properly.