Service manual
4-20
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The gas heater assembly consists of the supply
manifold pipe, gas valves and coils, ignitor, burner
and combustion tube with sensors.
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The thermal limiter and safety thermistor are
mounted to the upper left hand side of the
combustion tube assembly.
To remove the thermal limiter and safety
thermistor:
1. Remove the top panel, rear panel, console,
front panel, front inner panel and drum.
2. Disconnect the electrical leads from the
thermal limiter and safety thermistor.
3. Using a #2 square bit screwdriver, extract
the screws securing the sensors to the
combustion tube. (See Figure 4-49)
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sss CCoonnnneeccttiioonnss ((GGaass MMooddeellss))
To remove the wire harness connections:
1. Remove the top panel, rear panel, console,
front panel, front inner panel and drum.
2. Label the connections as needed prior to
disconnecting.
3. Disconnect from the Molex connectors for the
ignitor, sensor and main wire harness.
(See Figure 4-50)
4. Disconnect wire leads from gas valve coil
terminals.
GGaass VVaallvvee CCooiill RReemmoovvaall ((GGaass MMooddeellss))
The gas valve coils are secured by a bracket that
has two screws fastened into the gas valve body.
Small plastic pins locate the coils for proper
alignment.
To remove the gas valve coils:
1. Remove the top panel, rear panel, console,
front panel, front inner panel and drum.
2. Disconnect the two wire harness leads from
the gas valve coil terminals.
3. Using a #2 Phillips head screwdriver, extract
two screws securing the coil bracket to the
valve body. Remove bracket from valve body.
(See Figure 4-51)
4. Pull coils from valve body.
FFiigguurree 44--5500..
DO NOT
GRIP
HERE
FFiigguurree 44--5511..
Plastic Coil
Pins
To Control
To Gas Valve Coils
To Ignitor
To Sensor
Screws
FFiigguurree 44--4499..
Heater
Assembly
Tube
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BBEEFFOORREE SSEERRVVIICCIINNGG AA GGAASS DDRRYYEERR..
Thermal
Limiter
Safety
Thermostat