Roberts Gorden BH15UT, BH35UT/EF, BH40DL U-Tube, Troubleshooting Flow Chart Linear, Double Linear

		Replace ignition	No
		module.
Turn up thermostat.	No	Place a jumper across	No
		the thermostat terminals.
Does the fan turn on?
		Does the fan turn on?
		Yes
		Check thermostat wiring
		and replace thermostat if
		necessary.

Yes

Is there power out

from pin 10 on

ignition module?

Yes

Is there power (230V)

at the burner?

No

Check relay wiring

(if applicable) and wiring

to the burner.

Yes

Remove Black & White

leads from the pressure switch; No place jumper between leads.

Does the fan turn on?

Yes

Replace pressure switch.

Remove obstruction. Yes

Replace Fan.

Yes

Unplug burner.

Does the fan turn freely?

No

Is the fan obstructed?

No

Fan bearings may have

failed. Replace fan.

16.1 Troubleshooting Flow Chart (Linear, Double Linear

Unplug burner and check

Is there spark at the igniter? No electrode and ignition wire. No

Are they damaged?

Yes

Replace electrode and ignition wire as needed.

65 of 75

Is the igniter gap

set at 3 mm?

No

Carefully reset gap

to 3 mm.

Replace automatic

control unit.

Yes	Is the flue pipe or	Yes
	the inlet of the
	burner obstructed?
	No

Are the hoses to the pressure No switch secure and leak free?

Yes

Remove Black and Yellow No leads from the pressure switch;

place a jumper between leads.

Is there a spark?

Yes

Replace pressure switch.

Remove obstruction.

Repair, replace or

tighten hoses as necessary.

and U-Tube)

SECTION 16: TROUBLESHOOTING