Troubleshooting Guide - HearthStone Sterling-Ht 8532 Owner's Manual & Installation Manual

TROUBLESHOOTING GUIDE

Symptom
1. Pilot will not light.
2. Pilot will not stay lit after
carefully following lighting
instructions.
Possible Cause
A. Insufficient gas pressure,
air in the pilot line, or dirty
or kinked gas line.
B. Pilot orifice plugged.
C. Defective or misaligned
electrode at pilot.
D. Defective igniter.
E. After sitting for "off"
season (summer), pilot
assembly may be dirty.
A. Low or too high gas
pressure
B. Faulty connections.
C. Defective thermocouple. C1. Ensure that the thermocouple connection at the gas
D. Pilot dirty or plugged.
Corrective Action
A. Using the piezo sparker, try to light the pilot. If it will not
light, check the inlet gas pressure.
B. Clean or replace the pilot assembly.
C. If a match lights a pilot, check the electrode gap and
location. Should be a 1/8" gap in the flame area.
D. Check for a good connection between igniter and
electrode. Check wire insulation. If properly connected
and no spark, check/replace battery. With new battery and
still no spark replace igniter.
E. Clean or replace the pilot assembly.
A. Check for proper inlet pressure for the gas being used.
B. Measure voltage between valve body and solder
connection on the rear of the valve (where the blue wire
connects). It should be no less than 7 mV.
valve is tight.
C2. Check thermocouple output using milli-volt meter.
Disconnect from valve and read voltage across wire ends.
If the reading is less than 15 mV, replace the pilot
assembly.
C3. If burning NG, check pilot flame to see that it is
impinging on the top of the thermocouple. Clean or
replace pilot for maximum flame impingement.
D. Clean or replace the pilot assembly.
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