Nice one Chris... I feel your pain with the elcetrics especially when alarms are involved! Its so nice when you get it done now, you end up knowing a hell of a lot more about them when you're done and future issues are much easier to resolve. Good luck with it all. Seems like you attacked it all at the right time looking at your old matrix.
Well the old matrix was causing the screen to mist up
plus it wasnt getting very hot.
Today I recovered the heater box flaps (air temp & face) with some carpet as I had no foam
Before:
After:
The cables and the sliding mechanisms got a good splatting of grease:
Speaking of cables, the feet vents were constantly blowing so I adjusted the cables accordingly. Took some figuring out
Still no more progress with the wiring, but the heater box c/w fresh new matrix will be refitted this week, and it all falls into place after that