A SERVICE OF

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T
HERMO
90 / 90 S
9REPAIR
9-5
NOTE:
One of the newer models Thermo 90 shown.
Older models have the cable of the temperature
limiter located on the side.
Heater Thermo 90 S may have the control unit
located on the combustion air fan not affecting the
replacement of the temperature limiter and
temperature sensor.
Fig. 9-3 Replacement of Temperature Limiter and Temperature Sensor