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G. Both drive motor and blower (impellor /fan) motor not operating (do not start) and indicator
light
is on...
1. Fault in L1 or L2 termination(s) between terminal block and contactors (relays).
2. Failed contactors (both blower and drive).
3. Failed (both blower and drive) motor(s).
H. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model DSI module
or
Steam Model damper system pneumatic solenoid)...
GAS MODELS
1. Fault in sail switch circuit...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering...
1) Lint drawer screen is dirty.
2) Restriction in exhaust.
3) No exhaust air flow...
a) Failed impellor (fan/blower) "squirrel cage."
b) Loose or failed impellor (fan) assembly drive V-Belts.
c) Fault in impellor (fan/blower) motor circuit...refer to Item E and Item F in this
Troubleshooting Section.
2. Failed burner hi-limit switch.
3. Failed lint chamber sensor bracket basket (tumbler) hi-limit switch or circuit.
4. Failed temperature selection switch or circuit.
5. Failed temperature cycle thermostat (try another selection).
6. Failed heat timer.