on Saturday I replaced the mono valve in my 300SD per the usual symptoms, and it looked to be the culprit, as the rubber had a typical tear in it. it required a fair bit more force to get out than I expected, but I thought I put it all back together the right way but I could be wrong. I even tried unplugging it with no success. very timely to have no heat...

no fuses blown. any ideas where to start?

thanks.

__________________
1981 300SD - 283,000 KM's at purchase, 360k+ now. Engine replaced at 311k. 16" CLK wheels, w126 gen II cosmetic upgrades, late w126 leather interior. RIP. Parted and gone due to fire

1987 300SDL - 243K miles and counting. In winter hibernation!

2001 Ford F250 Super Duty "Platinum Edition" Lariat 4x4 7.3L turbo diesel, 295k+ miles, various mods for reliability and performance.