Thermo Pride OMD-70 User Manual

Page 37

All installations and services must be performed by qualified service personnel.

Is there combustion

airflow to the furnace?

Yes

Is there 120 VAC across

the burner motor?

Is the blower impeller spinning?

If so, check for blockages in or a
collapsed air duct. Is the air boot

shutter open adequately.

Yes

Check wiring to burner motor.

If okay, replace burner motor.

Correct wire connections.

Replace thermostat.

Are the thermostat wires

connected properly?

Yes

On the GMD,has 1 TDR

activated and closed the

output relay contacts?

If not, replace 1 TDR. On

OMD, is the oil primary

control receiving power?

Reset primary control. If

resetting the primary does

not work, replace control.

Is the transformer (GMD) or

oil primary control (OMD)

supplying 24 VAC to the

thermostat?

Replace control transformer (GMD)

or try resetting the oil primary

control (OMD). Replace the oil

primary control, if necessary.