Owner's manual

23
Problem 4
Outer combustion cone does not heat up on high thermostat setting.
Is proper
gas pressure being
supplied to the
heater?
Check for proper gas
pressure to the heater.
Proper pressure at high
heat should read 5 PSIG.
Yes
No
Is secondary
orifice plugged?
Remove orifice and clean it.
Yes
No
A. Remove thermostatic head from
thermostatic valve body. If outer cone lights, replace thermostatic head and sensor assembly.
-- OR --
B Replace thermostatic head
valve body.
Are there
blockages in
gas hose, piping,
air housing or venturi
tube?
Remove the component and clean it.
Yes
No