check for a reading within +/- 5% of the 30/3 MFD rating

Common indicators include a humming or buzzing sound from the control box

Can I use an oval capacitor to replace a round one

providing the necessary 40VA power for 24 volt control boards

What causes these burner tubes to fail or rust prematurely

Lennox 26H78 Rollout Switch check for a reading withinThe Lennox 26H78 Rollout Switch (catalog number 26H7801) is a critical safety component designed for furnace flame rollout protection. This OEM Lennox part is a manual reset, SPST (Single Pole Single Throw) configuration that actuates at a fixed temperature of 260 degrees F. When the switch senses excessive heat near the burner boxtypically caused by a cracked heat exchanger, blocked flue, or insufficient combustion airit breaks the 24V circuit to the