Vi. Troubleshooting - Thermo Pride CDX1-100N Installation And Operation Manual

All installations and services must be performed by qualified service personnel.
5. That failure to maintain and operate this furnace in accordance with these instructions could result in
hazardous conditions, bodily injury, property damage and may void the limited warranty on the
furnace.
6. Review with and encourage the user to read the label reproductions and all warnings and instructions
outlined on the front cover and in sections I, II and III of this manual and in the Users Information
Manual.
7. Recommend that the user have a qualified heating contractor inspect the furnace at the start of each
heating season. Inform the user of the frequency of inspection required for reach item in Section III of
the Users Manual.
Figure 25

VI. TROUBLESHOOTING

NOTICE: BEFORE TROUBLESHOOTING, FAMILIARIZE YOURSELF WITH THE START UP AND
CHECKOUT PROCEDURE.
ALL INSTALLATION AND SERVICES MUST BE PERFORMED BY QUALIFIED HEATING
CONTRACTORS.
To assist you in troubleshooting this furnace, it is equipped with an integrated ignition control with
diagnostics. These diagnostics evaluate what control system has experienced a failure and will activate a
flashing light on the control in different sequences to help pinpoint the failure which has occurred.
IMPORTANT: For your convenience, Thermo Products has installed a sight glass in the blower door of
this furnace. The number of flashes in groups should be observed through this sight glass and recorded
before turning off power to the furnace. Otherwise power to the furnace will be when turning off power or
removing the blower door which is equipped with door interlock switch, which will reset the control. Should
this occur, it will be necessary to restart the furnace and have the failure occur again.
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