No heat or lack of heat.

Is “Call For Heat” Light on?

Verify low level shut-down is not activated on units equipped.

Verify 12.6 volts min. at burner and charging circuit works properly.

Verify the burner is burning.

The burner is in a “lock out” condition, turn main power switch “off” then “on” again to reset the system.

Check to see if :

Burner stays burning

Burner lights but goes out

Burner does not light at all

This may have been an isolated incident caused by unknown factors.

Check that the power switch is “on”, the circuit breaker is not tripped and that the engine is running.

Is the thermostat set to the desired temperature?

Is there any showing on the temperature display?

Does the digital temperature read out jump all around or show “1” on the left side of the display, or show an obviously inaccurate reading?

Is thermostat calibrated correctly?

Replace Thermostat if burner and “call for heat” light do not function.

Check “Call for Heat” light bulb condition.

Check for proper burner adjustments.  Verify proper fuel and no contamination.  Check for obstructions in combustion chamber, flues, and exhaust stack.

Check the photo electric eye for a dirty lens and proper function.

Verify fuel supply to burner, check condition of fuel pump drive coupling, bleed system.  Check electrode condition and adjustment.  Check function of Ignition Transformer.

Set thermostat to material manufactures recommendations.

Check for power on the #3 terminal of the thermostat.  Check for damaged or incorrect wiring.  Check that ribbon cable is connected correctly between thermostat and LCD Display. 

A “1”  indicated the temperature sensor is disconnected or faulty.  An inaccurate or jumping display indicates the temperature sensor may be wet or shorted to the ground.  Dry off and/or replace sensor.

Calibrate thermostat according to instructions

Test the Primary controller function, replace if faulty.  Contact Stepp Mfg. if this does not correct problem.

651-674-4491

YES

NO

BURNING

NOT

BURNING

LIGHTS BUT THEN GOES OUT

DOES NOT LIGHT AT ALL

STAYS BURNING

PROBLEM

PERSISTS

PROBLEM

PERSISTS

YES

NO

NO

YES

YES

NO

NO

YES

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