Lennox COWB2

28
serViCe HiNTs
You may avoid inconvenience and service calls by checking these points before you call
for service:
iF YOUr sYsTeM is NOT HeaTiNg Or NOT giViNg eNOUgH HeaT . . .
POSSIBLE CAUSE WHAT TO DO
Thermostat is not set correctly Reset thermostat
Burner is not operating properly
Check ame. If it is yellow, the burner is not getting enough
air. Or, if ame is blue and noisy and seems to lift off the
burner, the burner is getting too much air. Contact your ser-
vice technician.
No electric power to boiler
Check overcurrent protection. Check to be sure electric power
supply circuit is “ON”.
Controls out of adjustment Reset according to instructions.
Radiators not heating
Open radiator vents to excess air. Check ow control valve (if
used). It may be in closed position.
Circulating pump not running Check overcurrent protection. Check relay operation.
Poor electrical contact Check all control terminals and wire joints.
Chimney ue is blocked
Pressure switch will not close and pilot spark will not operate
to start pilot. Have your service technician check and correct,
if necessary.
Rollout switch blown
Have your service technician check heat exchanged for block-
age. Replace rollout switch with exact replacement.
iF BUrNer is NOisY . . .
POSSIBLE CAUSE WHAT TO DO
Gas input amount is incorrect Contact your service technician.
relieF VaVle leaKiNg . . .
POSSIBLE CAUSE WHAT TO DO
Dirt on seat Open valve manually. Allow water to run and clear valve seat.
Water logged expansion tank Drain tank, see instructions.
HAVE YOUR SERVICE TECHNICIAN CHECK ANY PROBLEM YOU
ARE UNABLE TO CORRECT.
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS
1. Do Not try to light any appliance.
2. Do not touch any electric switch, do not use the phone.
3. Leave the building immediately, then call your gas supplier.
4. If you cannot reach the gas supplier, call the re department.