Page 1
TWH-G2-23 | 2400E, 2400EO, 250SX, 250SXO, 635ES, 635ESO Service bulletin Replacing and cleaning electrodes Introduction 6. Disconnect three yellow wires connected to the bottom of the electrode set. The electrode set may need to be cleaned or replaced if the 7.
Page 2
Service bulletin 2 | TWH-G2-23 | 2400E, 2400EO, 250SX, 250SXO, 635ES, 635ESO Cleaning electrode set 1. If electrode set gasket is discolored or torn, replace with a new gasket. 2. Using steel wool, gently polish all surfaces of the flame sensor rod and electrodes.