Regular Dealer Maintenance

open? Does the lever point in the same direction that the pipe runs (open)? Or is it at right angles (closed)?

NOTE: Before proceeding with the next checks, turn OFF the electrical power supply to the furnace. Remove the access doors.

•Is the control knob or switch on the gas valve turned to the ON position? If this or the preceding check shows an interruption in the gas supply, make sure the gas has not been shut off for safety reasons. If nothing else seems to be wrong, follow the startup proce- dures found on pages 4 and 5 of this booklet.

•If for some reason the vent is blocked, the draft safeguard switch will shut off the furnace. Reset the switch by pushing the button located on top of the switch. (See page 2 or 3 for switch location.)

If the switch trips a second time, turn off the furnace and call for service.

DOWNFLOW/HORIZONTAL ONLY—Check the manual-reset aux- iliary limit switch (when used) located on the blower housing. If the blower motor fails, this switch will shut off the furnace. Reset it by pushing the button on the switch. If it trips again, turn off the furnace and call for service.

•Check the manual-reset limit switch(es) located near the burners. If the furnace has experienced a high- temperature condition, due to inade- quate combustion air, these switches

will shut off the furnace. Reset the switch(es) by pushing the button on the switch. If the switch trips a second time, turn off the furnace and call for service.

•If your furnace still fails to operate, call your servicing dealer for troubleshooting and repairs. Tell your dealer the model and serial numbers for your furnace. (You should have them recorded on page 12 of this booklet.) By knowing exactly which furnace you have, the dealer may be able to offer suggestions over the phone, or save valuable time through knowledgeable preparation for the ser- vice call.

In addition to the type of routine main- tenance you might be willing to do, your furnace should be inspected regularly by a properly trained service technician. An annual inspection (or biennial inspection, at least) should include the following:

1.Inspection of all ﬂue product pas- sages—including the burners, heat exchanger, relief box, and vent pipe.

2.Inspection of all combustion and ventilation air passages and openings.

3.Close check of all gas pipes leading to (and inside of) your furnace.

4.Inspection, cleaning, and lubrica- tion (when required) of the blower motor and wheel.

NOTE: Refer to the unit Service Proce- dures for blower motor oiling informa- tion. When required, the motor

must be oiled by a qualiﬁed service technician.

5.Routine inspection and cleaning/ replacement of the air ﬁlter.

6.Inspection of all supply- and return-air ducts for obstructions, air leaks, and insulation. Any prob- lems found should be resolved at this time.

7.Inspection of furnace installation for proper support and any obvi- ous deterioration of the furnace. The support must be sound and without sags, gaps, cracks, etc., around the furnace base so as to provide an air seal between the support and furnace.

8.A check for loose connections attaching individual components. Inspection of all electrical wiring and their connections.

9.Operational check of the furnace itself to determine working condi- tion. Repair or adjustment should be made at this time.

Ask your servicing dealer for further details about an economical service contract that covers seasonal inspections.