Steffes 612EXT Troubleshooting Guide - Manual (Page 6)

FANS RUN
INTERMITTENTLY
Check for damper jamming
and bimetallic coil assembly
(39) calibration.
Recalibrate bimetallic
coil assembly (39),
or repair or replace
fan assembly (47).
Install damper
clearancing bracket,
Steffes ETS item
#5940209
Replace the fan high
limit switch (56).
MODEL: EXT
FUNCTION: Air Delivery
PROBLEM: Fans Run Intermittently
Before starting any procedures listed below, check room thermostat and circuit breaker settings.
NOTE: For cross reference to number coded components, refer to the Exploded View Diagram.
DISCHARGE AIR
TOO WARM
Check for damper
jamming or
obstruction.
Check bimetallic coil
assembly (39) for proper
calibration (see note).
Repair or replace
fan assembly (47).
MODEL: EXT
FUNCTION: Air Delivery
PROBLEM: Discharge Air too Warm
Before starting any procedures listed below, check room thermostat and circuit breaker settings.
NOTE: For cross reference to number coded components, refer to the Exploded View Diagram.
Problem
Present OK
OK
Problem
Present
Problem
Persists
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