Questions & Answers for: 1999 gmc jimmy blend door

...1999 GMC Jimmy starts blowing out 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 ...

...1999 jimmy blows hot air check the blend door motor under (behind) the glovebox. make sure the ac system is cooling first. friend fixed it, i took it apart and there was a crack in the main gear at ...

...gmc envoy, only blowing hot air even though control knob's at cold. Is it electronically controlled or by cable. help me thanx the system has what is called an electric temperature control blend door ...

1999 jimmy cycles form hot air to cool air constantly it seems like the flapper is changing postions back and forth This sounds like possibly a broken blend door on the heater box assembly or possibly

1999 GMC Jimmy ....replaced thermostat.....flushed system and replaced cracked radiator....heater coil is not leaking. A/C is a seperate unit, has its own switch and indicator light...that is not on..

...GMC Jimmy,4wd,4.3L,with climate control. I cannot switch mode on heat/ac,it constantly blow warm/hot air,also can hear a "clicking" sound behind dash,was told this a a "blend door motor" problem.To ...

1999 Jimmy is only blowing hot air. I removed the cover and see that there is only vacuum in the hot (red) line. The fan works at all the settings, but there is no cold and no A/C Is there some reason

blend door location and repair no heat every thing else is normal this is all thats left to check Are both of the heater hoses hot? If one is colder than the other your heater core is clogged and ...

...not closing inside or control panel sounds like the core is pluged ore the blend dores are not moveing. it more than likely is the temp. selector switch on the dash or the motor for the blend

1999 gmc jimmy heater runs hot when turned all the way up but runs cold if turned down even a little ? temperature all hot or all cold, no control. Have the temperature control blend door operation ...