Chapter 4
Troubleshooting
Cause: Catalytic pad is worn out
If the catalytic pad is covered in too much dust the propane is unable to effectively
interact with the catalyst. Gently blow any dust off of the pad being careful not to damage
the pad. If that doesn't work, the pad may be worn out and need to be replaced. It takes a
few years for a pad to wear out and the typical life span is around ten years.
Problem E: Heater Goes Out After Running at Least 30 Minutes
Cause: Catalytic pad is worn out
If the catalytic pad is covered in too much dust the propane is unable to effectively
interact with the catalyst. Gently blow any dust off of the pad being careful not to damage
the pad. If that doesn't work, the pad may be worn out and unable to remain hot enough
when the heater is on standby. A worn out pad will be nearly white and needs to be
replaced.
Cause: The thermocouple is out of position
If the thermocouple is more than a 1/8” from the catalytic pad or tilted at an angle (more
than a few degrees), the thermocouple may not remain hot enough when the heater is on
standby to allow gas to flow through the control. If the thermocouple is out of position,
remove the bottom grill on the heater and loosen the screw holding the thermocouple and
adjust the thermocouple so the plate is parallel to the pad and 1/8” from the pad.
Problem F: Flames are Visible after Pilot Light is Extinguished
Cause: Damage to catalytic pad or sealing cement
Use high temperature furnace cement to repair the damaged or missing sealant. If cement
has been lost from around a screw, retighten the screw before applying new cement.
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