A/C replacement causing RMP surge and pulling

M

Mayapapayia

New Member
Joined
Jan 7, 2019
Messages
11
Location
Virginia
Had the ac evaporator replaced. It wasn’t done right.

There has to be a wiring issue. The fan only works on 1 speed. As soon as the heavy system is turned on it surges the RPMs. I’ve replaced the fan switch a little while back and the fan switch has been spliced in as it had previously melted.
Any clue where to start looking?? I’m willing the retake the dash off but if I can avoid going back into the hvac box that’s be the real winner.
The system has also been professionally recharged so I know it has refrigerant.
PLEASSSE HELP!!!
 
There’s a resistor when burned out leaves you with one fan speed (high). Pretty common problem.
Look in the resources / how to section for a write up on replacing the resistor.
 
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