I'm not crazy, the attack has begun.
That's exactly what you cannot do with the Ampera. Forget your old ICE ways, you are now a part of history!I’m a mechanic,but not on ev’s.
I’ve got an ampera and this is what I’ve always done with any car with matrix problems.
Remove both hoses leading to the matrix in the engine bay,put a hose pipe onto one of them and turn on fully,if it’s got a slight block in it,it will come out.
If it’s not flowing,swop they pipes and try that.
If it’s blocked,then you’ll have to remove it.
The electric heat is by an element,only the heat off the ice is through the matrix in the car.
Let us know how you got on.