Carrier 58UVB A Check-Upchecklist, Before You Request A Service Call, For Insufficient Airflow

!CAUTION

UNIT AND PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in damage to unit components.

This furnace is designed for continuous return-air minimum temperature of 60_F db or intermittent operation down to 55_F db, such as when used with a night setback thermostat. Return-air temperature must not exceed 85_F db.

If you choose to leave your furnace on during extended absences do not set your thermostat lower than the limits shown in the Caution box above.

To protect your property from damage from potential problems due to unintended interruptions in utility services or other events, it is recommended that you either winterize your plumbing system or have someone check on your house regularly while you are away.

Your dealer or a licensed plumber can give you additional advice about winterizing your plumbing system.

A CHECK-UP CHECKLIST

Your furnace represents an important investment in your family’s comfort and your home’s value. To keep it performing properly and to prevent 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:

SInspect all flue gas passages, burners, heat exchangers, coupling box(es), and inducer assembly.

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

SCheck gas pipes leading to and inside your furnace for leaks.

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

S Inspect and change or clean air filters(s), if necessary.

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

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

SInspect electrical wiring, connections, and components for loose connections.

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

SInspect all condensate drain tubes and condensate trap assembly for leaks. The condensate removal system should be cleaned annually by a qualified service agency. Refer to the Service and Maintenance Instructions for further information.

SExamine the physical support of the furnace. Support should be sound with no cracks, sagging, gaps, etc. around the base.

SCheck 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 checking a few things yourself before calling for service.

For Insufficient Airflow:

SCheck for dirty air filter(s).

SCheck for blocked return-air or supply-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 furnace fails to start.

SCheck thermostat for proper temperature. Is thermostat set above room temperature?

SIs thermostat set on HEAT?

SCheck fuses and circuit breakers. Is electrical supply on?

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

NOTE: Turn off electrical supply before continuing with checklist.

SIs control switch on gas valve in ON position? (Follow startup procedures if you must reset switch to ON position.)

SCheck manual reset flame rollout switch located on the burner box. 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.

SCheck for obstructions around the vent termination outside the structure.

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

For your convenience, record the furnace product and serial numbers on back page. Should you ever require service, you will have ready access to the information needed by your service representative.

This furnace has a light-emitting-diode (LED) status code display to aid the installer, service technician, or homeowner while installing or servicing the unit. The LED code can be seen by removing the main furnace door and viewing the LED through the view port in the blower access panel. (See Fig. 2.)

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