2001 Chevrolet Blazer "blows cold hot" Questions

...air. The Heater core was flushed out, and both hoses connected to the heater core get hot. Any suggestions? The problem was a vacuum line leak. Replaced the line. 2002 Ford Taurus heater blows cold ...

...blowed hot then it started blowing cold again has a new radiator and the water is not low Flush coolant system out first with prestone or peak coolant flush if problem still exist replace heater

blows cold air i dont know what the main problem is your core could be clogged. you can flush it by removing both heater hoses coming from firewall and spaing the garden hose in one and then switching

...hot air in the first 5 minutes running and then will not be cold at all. Seen information that the blend door or acuator is stuck or not working properly. How do I get to the blend door and/or ...

2000 chevy blazer blows hot then cold,hot then cold. keeps cycling when in use chech your coolant make shure its full

When you turn inside fan on, no matter what temp setting, heat or A/C, it blows hot/cold hot/cold back and forth??? broken blend door

...blows out cold air under hood and condencer is very cold but always very hot air inside. Please help i need this unit due to astma and other breathing problems!!!!! Your heater valve is stuck open, ...

...HOT OR COLD MY 96 CHEVY BLAZER WILL NOT BLOW HOT OR COLD AIR . IT WAS BLOWING COLD BUT JUST QUIT ONE DAY . THE COMPRESSOR CYCLES FOR A FEW SECONDS THEN STOPS . ITS EEMS TO BE CYCLING REGULAR BUT I ...

...blows hot air even when the switch is off.  the system uses vacuum to operate the mode doors. the temp door is voltage to move between hot and cold 0 volts  to 12volts if control is sending ...

blows hot than cold back and forth . About 7 or 8 seconds it will blow hot than i can hear a valve or something and it will blow cold, back and forth never ending. this just started after installing a