Chrysler lhs 1997: blower motor won't shut off?

Question

Hi i have a 97 lhs and the heater wont shut off. i want to fix it myself but i dont want to order the wrong part. im confused if it might be the heater ac unit that needs to be replaced or if its a blower motor or module? ive been doing research online but i need an expert opinion. also if u know which part i need, how can i do it myself and with what tools? Thanks. It has auto climate control.

Answer

Hi Melissa, When you say that the heater won't shut off it appears to me that you mean that blower motor always runs and you can't turn it off. Is that correct? If so, then you need to change out the "blower motor power module" which is a solid-state device that normally has the ability to produce 14 different fan speeeds and also be turned off. The module is located in the HVAC housing under the dash. The way to find it is to remove the pad/duct on the lower edge of the instrument panel located on the passenger side (held in place by either push-pins or screws). That will give you a better view of the housing. At the very right end of it is the bloser motor housing where you will hear the blower motor running (round bottom piece with air intake fins opening). There is a twisted pair of wires coming out of the blower motor housing which are routed directly to the blower motor module. So just follow the twisted wires to get to the module. Unplug the twisted wire plug from the module and also the other multi-wire plug at the module. Then remove the screws that hold it in the housing to remove it for replacement. You can either buy a new blower motor power module or go to a wrecking yard to find one in a similar car with autoclimate control. Any model from '94-97 will do and most likely later similar body cars will also work, but you could verify with a dealer parts department as to the cost of the module and also what span of years use the identical module to your '97. Be sure to not buy a "blower motor resistor block" which is used in the conventional-type HVAC units as they are not interchangeable with the one used in the Auto Climate Control type. If I have not understood the problem let me know.