No heat on '07 W900

[ShaneG]

It hasn't been a real big deal until this morning. I like it cool in the cab but there is a big difference between cool and shivering. I've turned every valve under the hood on. And when I put it the red side on the controls it does nothing. If I put it on defrost the A/C turns on. Any help would be much appreciated.

[ShaneG]

Found it. Evidently there is an electronically controlled valve next to the firewall right below the heater core. I took just the motor part off and turned the valve by hand. I now have heat.

[KW Parts Guy]

Glad you got her all figured out!