Bruette
Well-Known Member
That is true. The first problem I had with our furnace turned out to be the motherboard. The second triggered the same code (pressure switch) One of the esteemed members of our coffee shop group recommended cleaning the flame sensor. Which solved the problem. God forgive me but I cannot remember who told me to clean the flame sensor. God knows and I'm certain God has or will bless him.Christmas Eve day our furnace stopped working. The fault code was pressure switch issue of some sort. The service guy came (we rent this house so I’m not going to screw around with it) and checked and cleaned a few things including the flame sensor and it’s been working since.
I keep a tool bag in the utility room to do service and maintenance. Since the flame sensor issue, I keep a roll of emery cloth in that tool bag. I now clean the flame sensor every time I service the furnace.
That is a smart move. You can't be blamed for anything if you don't touch it.we rent this house so I’m not going to screw around with it
Modern gas furnaces (high efficiency) don't produce much soot. But the flame sensor is metal, and it does corrode over time. Clean off the corrosion and it is good to go.the flame sensor is a common problem
I love my furnace; it is relatively easy to diagnose problems and simple to work on.
