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CTORY
II V
HS Models
BURNERS FAIL TO OPERATE
CAUSE REMEDY
1. Gas supply valve shut off 1. Open gas valve
2. No power, main electric switch open 2. Close switch
3. No power, blown or defective line fuse 3. Replace fuse
4. Pilot flame too low 4. Adjust pilot flame
5. Flame sensor contaminated 5. Clean sensor
6
. Roll-out switch open 6. Replace roll-out switch (inspect flue passages prior to
r
eplacement)
7. Defective air flow switch, restriction or obstruction in 7. Check air flow switch hose connections. Check for obstruction
venting system or restriction in venting system. Replace defective switch
8. Defective blower motor 8. Check voltage (120V) at motor connector. Replace
defective motor
9. Defective transformer 9. Replace Aquastat
10. Defective gas valve 10. Replace
BURNERS WILL NOT SHUT-OFF
CAUSE REMEDY
1. Defective Aquastat 1. Replace defective Aquastat
2. Improper wiring or short circuit 2. Check wiring
FLASH BACK-BURNING AT ORIFICES
CAUSE REMEDY
1. Manifold gas pressure too low 1. Adjust to proper manifold pressure
2. Improper primary air adjustment 2. Adjust air to produce soft, clean flame
3. Gas regulator bleed too slow 3. Adjust bleed opening
4. Burrs on orifices 4. Remove burrs
5. Improper orifice 5. Install proper orifice size
6. Adverse draft condition in boiler room 6. Check air supply and venting system
7. Low main gas pressure 7. Contact utility
General Troubleshooting Guide For Servicepeople
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