Hearth and Home Technologies FI36S O. Troubleshooting - “S” Series, Symptoms, Possible Causes

O. Troubleshooting - “S” Series

Symptoms	Possible Causes	Corrective Action
1 Match will not light pilot.	a. Main gas shutoff valve closed.	Make sure that the shutoff valve located on the
		incoming gas line is open.
	b. Air in the gas line.	Light a match. Turn valve knob to “PILOT” position
		and depress. Keep match near pilot burner until it
		lights.
	c. Valve knob is in “OFF” position	Turn valve knob to “PILOT” position and depress.
		Keep match near pilot burner until it lights.
	d. Pilot orifice is plugged, not	This repair requires tools and some degree of
	allowing gas to flow	experience. Call a qualified service technician.
	e. No gas supply to the appliance.	Check the plumbing to ensure the appliance has
		been hooked up to the gas supply line.
2 Pilot lights, but will not stay lit	a. Thermocouple too tight or too	Thermocouple must be attached to the valve finger-
after carefully following lighting	loose.	tight, plus a 1/8 turn with a wrench.
instructions.
	b. Weak pilot flame.	Pilot flame must engulf the thermocouple. Clean
		and/or adjust pilot for maximum flame impingement
		on the thermocouple.
	c. Defective thermocouple.	Check the thermocouple with a millivolt meter as
		follows: Disconnect the thermocouple from the
		valve and connect the red lead of the meter to the
		silver end of the thermocouple. Now connect the
		black lead of the meter to the copper tubing of the
		thermocouple. Light the pilot and keep the knob
		depressed while taking readings. The meter readings
		should be greater than 14 mV. If not, replace
		thermocouple.
3 Pilot “ON”. No gas to main	a. A blockage is preventing gas	Inspect the burner orifice for obstruction. Call a
burner, valve knob “ON”.	flow.	qualified service technician.
	b. Defective valve.	Replace gas valve. Call a qualified service
		technician.

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