Heater Blows Cold Sometimes

[Trout Slayer]

My 2010 with ATC blows cold sometimes when should blow warm. If I switch the unit off and back on it will sometimes work. Might come back in a few hours or day and it works fine again. Any ideas?

 

[07EddyB]

Generally when you have a temperature problem - it's a blend door. Since you have ATC then that changes things a bit. A bad blend door fails period - it strips the gear and it doesn't come back occasionally and work. You may have a problem with the head unit itself.

 

[D Hook]

Might want to check you radiator level also. Sometimes a low level will result in what you describe.

 

[Mbrooks420]

Generally when you have a temperature problem - it's a blend door. Since you have ATC then that changes things a bit. A bad blend door fails period - it strips the gear and it doesn't come back occasionally and work. You may have a problem with the head unit itself.

This isn’t necessarily true. My blend door is hinky, but under certain conditions it’ll still shuttle.