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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Hearth and Home Technologies FI42ML, FI42SL, FI36ML, FI36SL manual Troubleshooting S Series
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FI36SL, FI36ML, FI42SL, FI36M, FI36S specifications

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