Shelby789
Veteran Member
I have noticed recently that the temp gauge on my TDi will climb well above the 190~200deg. F range and creep toward the 230.....turning on the heat or AC doesn't seem to budge the gauge, but it will always suddenly "Jump" from 230 back down to 190 in a second or less.
I thought I might be looking at a faulty temp sensor, but when I went to pull it last night, I noticed it looks unusually clean, I think the previous owner may have already been down this road.
I am looking for direction on telling the difference between a bad sensor and a bad gauge? Is it possible I am looking at a bad t-stat that opens late, the speed with which the gauge goes back to "normal" makes me think I am looking at an electrical issue and not a t-stat issue?
I thought I might be looking at a faulty temp sensor, but when I went to pull it last night, I noticed it looks unusually clean, I think the previous owner may have already been down this road.
I am looking for direction on telling the difference between a bad sensor and a bad gauge? Is it possible I am looking at a bad t-stat that opens late, the speed with which the gauge goes back to "normal" makes me think I am looking at an electrical issue and not a t-stat issue?