Kind of out of the normal range of up to 80, so I hear.
It may even be that one caused the wearing off of the other?..
Anyway, I have a MAJOR issue with the furnace design, and the way the HSI is buried in the guts of the furnace. It's beyond me what convoluted brain could design something like this.
The gas supply pipe goes in from the front - the GV takes the supply from left side and the output goes into the furnace at a 90 degrees angle (measured across the input line).
In the tunnel of "design stupidity" goes the gas pipe and a metal bracket/ collar, that has the HSI mounted on with a screw, at the FAR end, far inside.
I will look again, but last night I did not see any obvious way of taking the HSI out without taking out the gas supply assembly (line + GV).
I really hope that I am wrong...
Gee... OK, finished venting.
'later