Check the igniter to see if it’s ok. Measure the resistance.
Function: The Hot Surface Ignition (HSI) is heated electrically to ignite the Burner. The HSI requires 120 VAC power which is supplied by the Ignition Control Module. The HSI requires about 20 seconds to reach operating temperature.
Servicing Procedure:
1. Turn off the pump and all electrical power to the heater.
2. Disconnect the Igniter wires at the Molex connector.
3. Loosen the nuts holding the Igniter Bracket.
4. Carefully remove the HSI from the unit.
5. Check resistance across HSI to test. Resistance should be 40-75 Q at room temperature. Cracks in HSI which affect performance will alter resistance level but may be too small to see.
Function: The Hot Surface Ignition (HSI) is heated electrically to ignite the Burner. The HSI requires 120 VAC power which is supplied by the Ignition Control Module. The HSI requires about 20 seconds to reach operating temperature.
Servicing Procedure:
1. Turn off the pump and all electrical power to the heater.
2. Disconnect the Igniter wires at the Molex connector.
3. Loosen the nuts holding the Igniter Bracket.
4. Carefully remove the HSI from the unit.
5. Check resistance across HSI to test. Resistance should be 40-75 Q at room temperature. Cracks in HSI which affect performance will alter resistance level but may be too small to see.