My original monovalve quit and I bought a replacement ...cheap aftermarket.

It seemed to work for 10 minutes and (heat came on and off) and now no heat...
No heat under no circumstance means the aftermarket monovalve is in closed position and won't open?

Is this a correct assumption?

I always thought when the monovalve is not plugged in then there is heat all the time?

If this is true then there would be power on all the time if the heat is not working...?

Does that mean that the CCU (dial in the middle dash) is not working as an option?


If you say it is clearly the aftermarket monovalve failing ... then I'll bite the bullet and buy the MB part.

Martin