HVAC Setting 1,2,3

[SlyStoner421]

Another problem here, my HVAC settings 1,2,3 don't work only the high does. and also my heat doesn't seem to be very hot. I switched in a brand new 180 degree thermo and it didn't make a difference. what would cause this? clogged heater core?

[TSTONE]

blower motor resistor

back flush the heater core

[SlyStoner421]

you the man lol

where is the resistor pack and how do I fix it? I could do a search but since your so quick at answering

[SlyStoner421]

and how would I back flush my heater core? do I have to take it to a shop?

[TSTONE]

should be located on the side of the blower motor

use a prestone kit

[meissen]

Is 180 the stock thermo? I've heard if you get a 160 your car doesn't get quite as hot and won't blow hot as stock.

[JoeliusZ28]

the resistor was right behind the dial on my sisters grand prix

[SlyStoner421]

no i think it had a 160 in it, but i replaced it with a new 180, which is supposed to be stock. someone said back flush the heater core..but how do i just flush the heater core? take off the hose heading into the core? is the prestone kit pressureized or something?

[SlyStoner421]

removed the hoses off the waterpump and used compressed air to blow it clear. heat is back and toasty, thanks for the help.