Heater controls wired up wrong and/or relay clicking [Archive] - Toyota MR2 Message Board

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A while back I had a leak on the coolant system and it was found to be the heater matrix. It was taken out and replaced, and as you will know the entire dash had to come out. However, since putting it back the heater controls have been a bit weird to say the least. When moving the controls from cold to hot, it should simply just change the temperature. However, now when I move it from cold to hot, when it gets half way, the actual speed of the air coming out jumps up as if you have turned