No floor heat

[jbach36]

I did the feared hvac pod replacement job a few weeks ago on my W124 and for the first time in years I have air blowing out the center vents.

I did not change out the floor pod because mine appeared to be in perfect condition and it held vacuum. However now that cold air is here, I find that I have no floor heat in any setting; Economy, bi-level, etc.

What might be causing this?

1991 300d 235k

[Usaguy]

Originally Posted by jbach36

I did the feared hvac pod replacement job a few weeks ago on my W124 and for the first time in years I have air blowing out the center vents.

I did not change out the floor pod because mine appeared to be in perfect condition and it held vacuum. However now that cold air is here, I find that I have no floor heat in any setting; Economy, bi-level, etc.

What might be causing this?

1991 300d 235k

- a disconnected or broken vacuum line
- bad switchover valve
- bad climate control unit
- wiring?