Installation manual

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a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering ...
1) Lint screen is dirty.
2) Restriction in the exhaust.
3) No exhaust air flow ...
a) Failed impellor (fan/blower).
b) Fault in blower (impellor/fan) motor circuit (for Reversing Models ONLY).
2. Tripped burner hi-limit.
3. Tripped lint chamber sensor bracket basket (tumbler) manual reset hi-limit thermostat.
U. Heating unit is not operating (no heat)...voltage is evident at the heating unit (i.e., DSI [Direct
Spark Ignition] module)...
1. Fault in Direct Spark Ignition (DSI) system ...
a. Spark probe sparks, but no ignition and DSI module "LOCKS-OUT" ("red" L.E.D. indicator flashes) ...
1) Flame probe assembly is out of adjustment or has failed.
2) Severe air turbulence.
3) Failed DSI module.
4) Failed gas valve.
b. Spark probe sparks, but burner goes off right away ...
1) Flame probe assembly is out of adjustment or has failed.
2) Sail switch is fluttering ...
a) Lint screen is dirty.
b) Restriction in exhaust duct work.
c. Spark probe does not spark and DSI (Direct Spark Ignition) module "LOCKS-OUT" ("red" L.E.D.
indicator flashes)...
1) Fault in Spark Probe wiring...break or loose connection.
2) Failed spark probe assembly.
3) Failed DSI module.