Does anyone remember the Andy Griffith show? If so, do you remember Goober Pyle? Well his incarnate works at Lake Wedowee Auto Parts in Wedowee Alabama. I told them my HVAC wasn't working correctly. Hot air came out of the outlets no matter what the temp was set to. The only way to get anything else was to use max ac. They had my explorer for a week! Last week, I noticed I could not use my defroster because only cold air would come out. Then I found out why. Goober cut the vacuum line to the heater control valve and connected it to the vacuum line coming off the intake manifold. That closes the valve and stops hot coolant from entering the heater core. Yep! That stopped hot air coming out of the outlets, but I cannot get it now even when I want it. Look at the pics and you will see. I urge anyone living in that part of the USA, not to use these guys.