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TECHNICAL HELP

TROUBLESHOOTING GUIDE

INTEGRATED FURNACE CONTROL MODULE

Place incline

Test for

manometer in

continuity across

series with

pressure switch.

pressure switch

tubing.

Inducer Draft Motor and Pressure Switch Check

268

www.white-rodgers.com

NO

NO

3C

YES

Disconnect electric power at fuse or circuit breaker.

3D

!

WARNING

If diagnostic indicator (LED) shows continuous flashing, turn off gas supply at source before disconnecting electrical power!

Is diagnostic

Jumper

LED flashing 2

pressure

times?

switch.

Call for heat. Thermostat contacts R & W close.

3H

Check inducer wiring. If OK, repair or replace inducer motor. Check operation.

Replace pressure switch. Energize system. Check operation.

3J

Is pressure greater than pressure switch specs?

3K

NO

Remove vent connector from furnace flue collar.

3L

Is pressure greater than pressure switch specs?

NO

Repair leaks in inducer assembly or replace induced draft motor. Check operation.

Is induced

YES

Is diagnostic

draft motor

LED flashing 3

energized?

times?

Does ignitor glow?

3I

YES

YES

YES

Replace pressure switch. Check operation.

YES

Correct blocked or incorrectly installed vent. Check operation.

NO

CHART 3

3A

3F

3E

NO

Is pressure switch welded closed?

3B

NO

3G

YES

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