never had a problem with mine at all. the only downfall that i have gone through is that you should get the P0128 code deleted. that is when you change to a 160 t-stat. that code is telling the brain that your car is not warming quick enough(at all), so you throw a light. or you could do what i did and just stick a 22k ohm resistor in there and call it a day. BUT, then you will NOT have any air conditioning. just some fyi. take care and good luck