Equipment
- Lennox gas furnace in an attic
Lennox furnace control board replacement in San Ramon
Problem: This San Ramon home has a Lennox gas furnace up in the attic. Its main control board had failed.
Diagnostics: On the back of the old board, one of the copper traces was burned and discolored along part of its length. A trace is the printed wire that carries current between parts of the board. Once a trace burns like that, the board can’t be trusted to run the furnace.
Solution: We replaced the main control board. The new board went in where the old one was mounted, and we moved the furnace wiring over to it.
Result: The furnace now has a new main control board in place of the burned one. Many furnace boards have a small status light you can see through a window in the door. If yours starts blinking a pattern it didn’t show before, write the pattern down before you call. It tells the technician where to look first. We repair Lennox furnaces in San Ramon and across the Tri-Valley.
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