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2-15. GAS CONTROL VALVE
REPLACEMENT
(Continued)
Figure 2-41
Figure 2-42
2-16. BLOWER MOTOR
REPLACEMENT
Figure 2-43
106
5. Using a pipe wrench, loosen the outlet fitting to the burner.
Figure 2-41.
6. Using a Phillips screwdriver, remove the 2 screws securing
the gas valve to the bracket and remove gas valve from unit.
Figure 2-42.
7. Remove the fittings from the gas valve and install in new gas
valve.
8. Install the new gas valve in reverse order.
The blower motor assembly induces the draft for the burners. If the
blower motor fails, the air switch will fail to close, causing an
"E-20B" error code in the display.
1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move the
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Remove screws securing the rear cover to the unit.
Figure 2-43.
Model OFE/OFG/OEA/OGA-341, 342
2-15
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