I bypassed the blower switch in the car and this did not change anything. I then again replaced the blower motor. I now have decent air coming out the floor but very little out the defrost and vents. Just enough to keep the car somewhat warm. Does any one know of a resistor that would be any part of the heating system. My local dealer checked for me and said that they do not list one but that does not mean it doesn't have one that also control somthing else. Again any recomendations are greatly appriciated as this is just kicking my A** trying to get enough heat in the car.
I have a 1990 MGM with manual heating controls and do not have enough heat coming into the car. The air I am getting seems like it would be on low speed. Not enough to keep me warm at all. I have done the following so far after reading other posts.
Replaced radiator and hoses. (rad was leaking)
replaced blower motor, blower switch, blower resistor.
I also removed the A/C core thinking that maybe this was blocked up do to what I could see with the blower motor out was nothing but bugs and junk in the visible fins.
I do have just as much heat coming out the heater core as what I have going into it when the car is warmed up. Is there any thing else I should look at or is there a way to test the resistor or the switch. The next chance I get I am going to run a wire direct to the blower motor to see what I get. I would assume that this would make the blower motor run on high speed? which would tell me if the new blower motor is bad.
Any help would be greatly appriciated as I would like to keep this car as it was my wifes Grandfathers.
Last edited by dannyda; 01-21-2009 at 09:19.