Bryant 345MAV CHECK-UP Checklist, Before YOU Request a Service Call, For Insufficient Airflow

ACHECK-UP CHECKLIST

Your furnace represents an important investment in your family’s comfort and your home’s value. To keep it performing properly and as a preven- tative to future problems, have a trained service specialist give your furnace a professional check-up annually. The following checklist can be used as a guideline to proper service:

•Inspect all flue gas passages, burn- ers, heat exchangers, coupling box(es), and inducer assembly.

•Inspect all combustion-air and vent piping inside structure and vent pipe termination outside the structure.

•Check gas pipes leading to and inside of your furnace for leaks.

•Inspect and clean the blower motor and wheel.

NOTE: The inducer and blower motors are pre-lubricated and require no addi- tional lubrication. These motors can be identified by the absence of oil ports on each end of the motor.

•Inspect and change or clean air fil- ter(s) if necessary.

•Inspect all supply- and return-air ducts for obstructions, air leaks, and insulation. Remedy any problem when necessary.

•Inspect the return-air duct connec- tion(s) at the furnace to ensure it is physically sound, sealed to the furnace casing, and terminates outside the space containing the furnace.

•Inspect electrical wiring, connec- tions, and components for loose connections.

•Perform an operational checkout to determine whether your furnace is working properly and if it requires adjustments.

•Inspect all condensate drain tubes and condensate trap assembly for leaks. The condensate removal system should be cleaned annually by a quali- fied service agency. Refer to the Ser- vice and Maintenance Instructions for further information.

•Examine the physical support of the furnace. The support should be sound with no cracks, sagging, gaps, etc. around the base.

•Check furnace for any obvious signs of deterioration.

BEFORE YOU

REQUEST A

SERVICE CALL

If your furnace is not operating or not performing properly, you may save the expense of a service call by check- ing a few things yourself before calling for service.

FOR INSUFFICIENT AIRFLOW:

•Check for dirty air filter(s).

•Check for blocked return-air or sup- ply-air grilles throughout your home. Ensure they are open and unobstructed.

If problem still exists, call your dealer for service.

IF FURNACE FAILS TO OPERATE:

Follow this checklist step by step, advancing to the next step only if fur- nace fails to start.

•Check thermostat for proper tem- perature. Is thermostat set above room temperature?

•Is thermostat set to HEAT?

•Check fuses and circuit breakers. Is electrical supply on?

•Is manual shutoff valve in gas supply pipe in open position? (Follow start-up procedures if you open gas valve.)

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NOTE: Turn off electrical supply before continuing with checklist.

•Is control switch or knob on gas valve in ON position? (Follow start-up procedures if you must reset switch or knob to ON position.)

•Check manual reset flame rollout switch located on the burner box. (See Fig. 2.) If furnace has experienced high temperature conditions, this switch will shut off the furnace. Reset it by pushing the button on the switch. If it trips again, shut down the furnace and call for service. See “Shutting Down Your Furnace” section in this manual.

•Check for obstructions around the vent termination.

If your furnace still fails to operate, call your service representative.

For your convenience, record the fur- nace product and serial numbers on page 2. Should you ever require ser- vice, you will have ready access to the information needed by your service representative.

This furnace has an LED operation and fault code display to aid the installer, service technician, or home- owner while installing or servicing the unit. The LED code can be seen by removing the access door and viewing LED(s) through the view port in the blower access panel.

NOTE: Removing the blower access panel or turning off the 115-v electrical power supply will terminate LED diag- nostic code display.

To decipher the meaning of the LED code, and suggested action, the follow- ing cross-reference can be used.