1991 GMC Sierra "heater working" Questions

My 2011 GMC Sierra the heater will not come when I remote start it but turn key on it will come on If the heater blower circuit was not connected to the bypass relays of the remote starter unit, then ...

Heater not working my truck has no heater and the temperture gauge is high Probably air lock in the heater core. While engine running pull off heater return line and be ready to put it back on quickly

heater switch does not work in all setting's 1 to 5 on a 1996 gmc seirra truck heater switch does not work in all setting's 1 to 5 on a 1996 gmc seirra truck Problem need a heater/ac fan ...

...heater not working I have a 93 GMC Sierra 2500 diesle and the heater is not blowing warm air just a few days ago the heater was blowing hot hot air now nothing THERMOSTAT REPLACE IF NOT SEE IF HOSES ...

heater works defroster does not the heater works just fine but when i turn on the defroster the heater still stays on.i am not sure if it is the ducts or the controls. It sounds as though you're ...

...working heater blower I tested the motor,it's fine. when I unplug from the motor speed resistor,The fan will work on high speed only.If I plug back in ,nothing......probably the resistor? thanks no ...

...working freely have some one move heater knob in car to see if it opens and shuts , this may be blocked so remove and clean inside this part check when off that valve opens and shuts, also if your ...

Kia Rio....fan/heater not blowing air. Air conditioner/heater fan not working. Check the fuses and relays for heater and AC. If good , a fusible link wire could have burned out.

...10 amp an # 70 40 amp . HVAC BLWR . HVAC = heater ventilation an air conditioning ! So Tom what problem are you having ? Heater fan not working ? There is also a blower motor control module involved

does my heater coil work off a vacum system to switch from air cond, to heat can't get hot air coming from the heater coil, only cool air coming thru when you ask for heat Sounds like it could