Its not that the heat doesn't "work", it just doesn't work when I want it. If I set the automatic HVAC control to 90 on both driver and passenger, I still get nice breezy AC. Sometimes after a good 20-30 minutes, all of a sudden burning hot air comes shooting through the vents all of a sudden. Sometimes it does work, but that is very rare. Sometimes it doesn't go on at all.
This has been going on for a while but I kind of forgot about it since its been summer and the AC works great.
I replaced the blower control module last week due to a spotty blower. The blower is working perfectly now, but still no heat.
I did some searching, and I got a little lost because I don't understand the system all that well. It looks like it could be a blend door or a temp blend actuator. Can anyone explain if these sound like the problem, and if so, Where I would find it to fix it? I presume its in the vicinity of the heater core above the blower, and it makes sense it could be the actuator because it does work sometimes after a while, like it may be "trying" to change, but with the full digital HVAC system, I thought it might also be something else, like a resistor or I read about a HVAC control computer or something similar.
If it is the blend actuator, then I did find this: http://chevyavalanchefanclub.com/cafcna/index.php?topic=106886.0 But thats pretty involved if that isn't a likely problem! I also was reading about how the blend door would effect just passenger OR driver, but this is always the same, either it works for both or it works for neither, which makes it sound like something different.
Thanks!
This has been going on for a while but I kind of forgot about it since its been summer and the AC works great.
I replaced the blower control module last week due to a spotty blower. The blower is working perfectly now, but still no heat.
I did some searching, and I got a little lost because I don't understand the system all that well. It looks like it could be a blend door or a temp blend actuator. Can anyone explain if these sound like the problem, and if so, Where I would find it to fix it? I presume its in the vicinity of the heater core above the blower, and it makes sense it could be the actuator because it does work sometimes after a while, like it may be "trying" to change, but with the full digital HVAC system, I thought it might also be something else, like a resistor or I read about a HVAC control computer or something similar.
If it is the blend actuator, then I did find this: http://chevyavalanchefanclub.com/cafcna/index.php?topic=106886.0 But thats pretty involved if that isn't a likely problem! I also was reading about how the blend door would effect just passenger OR driver, but this is always the same, either it works for both or it works for neither, which makes it sound like something different.
Thanks!
