SYMPTOM

POSSIBLE CAUSE

CORRECTIVE ACTION

3.Check thermopile with millivolt meter. Take reading at “TH- TP&TP” terminals of gas valve. Should read 325 millivolts mini- mum while holding valve knob depressed in pilot position, pilot lit, and on/off switch “OFF”. Re- place faulty thermocouple if read- ing is below specified minimum.

4.Disconnect thermopile leads from the valve. With pilot burner "ON", take reading at thermopile leads - should read 325 millivolts minimum. Replace thermopile if reading is below this minimum.

III.Pilot burning, no gas burner, valve knob "ON", "on-off" switch "ON".

B. Open wire connection in pilot circuit.

C. Defective valve.

A. "ON-OFF" switch or wires de- fective.

B.Thermopile may not be gener- ating sufficient milli- voltage. (325m.v.)

1.Check wire continuity and con- nection in pilot circuit.

1.Disconnect the thermopile's red wire from the micro-switch and connect to terminal "TP" on the gas valve. Turn green knob to pilot position, depress and light pilot light. If meter reading is greater than 325 m.v. after 30 seconds, the pilot generator is good. If pilot does not stay lit, the valve is defective. If the meter reading is less than 325 m.v., the thermopile is defective.

1.Check "on-off" switch and wires for proper connections. Place jumper wires across terminals at switch-if burner comes on, re- place defective switch. If OK, place jumper wires across switch wires at gas valve-if burner comes on, wires are faulty or connec- tions are bad.

1.Recheck Symptom #2.

2.Pilot flame not physically close enough to thermopile.

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Heat & Glo LifeStyle ST-38HV-AU manual Symptom Possible Cause Corrective Action