DIRECT VENT GRAVITY GAS WALL HEATER 29
ISSUE POSSIBLE CAUSE(S)
CORRECTIVE ACTION
Check the thermostat calibration or replace.
Replace the valve.
Adjust pilot ame. Check vent tube and air inlet tube. Be sure
pilot lighting door is closed. Pilot orice or aerating hole may
be plugged (check for spiders, webs or other material).
Clean and replace.
Adjust pilot ame.
Casing may be distorted by being fastened to an uneven wall.
Vent tube and air inlet tube may be in a bind with a vent cap
assembly. Be sure the hole through the wall is correct and
parts t without binding.
Tighten blower screws.
Clean blower wheel.
Straighten or replace.
Select fan speed.
Add oil as outlined in blower instructions.
C. Defective thermostat.
D. Dirt under the valve seat or
valve stuck open.
A. Pilot ame may be low or
blowing (High), causing the
safety to drop out.
B. Broken or no gaskets on control
or pilot observation doors.
A. Delayed ignition - pilot ame
may be too low.
B. Expansion noise ticking.
A. Housing rattling.
B. Blower dirty.
C. Blower wheel bent.
A. Fan switch not set.
B. Check bearings.
7. Pilot outage problem.
8. Abnormal operation.
9. Noisy Blower.
10. Blower does not run.
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