HVAC Site - Professional HVAC Contractors Forum banner

older

  1. Residential HVAC Forum
    Did a call today on an older Rheem up-flow furnace with two Nox rods in each of the 4 burners. The burner hi limit switch had popped. After cleaning the heat exchanger with compressed nitrogen and replacing the dirty air filter, I fired up the furnace. In 3 of the burners the rods looked in...
Top