Attention: TDR Forum Junkies 
my heater defrost sometimes sticks and wont go into defrost mode or back to vents with a/c is there a mod i can do without taking the whole system apart ,i dont want to disconnect the a/c at all. this is the best a/c system i have ever had it blows the coldest air and i dont want to break the system ... has anyone had the fix and could you tell me what that consisted of?? i have 2003 hotd 3500srwquad cab
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