Carrier 58MCB CHECK-UP Checklist, Before YOU Request a Service Call, For Insufficient Airflow

6.Insert field-supplied funnel into tube.

7.Pour 1 quart of antifreeze into funnel/tube. Antifreeze should run through inducer housing, overfill condensate trap, and flow into open field drain. (See Fig. 43.)

8.Remove funnel and tube from inducer housing and replace drain connection cap and clamp.

9.Replace main furnace door. (See Fig. 36.)

10.Propylene glycol need not be removed before restarting furnace.

A CHECK-UP CHECKLIST

Your furnace represents an important investment in your fami- ly’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:

•Inspect all flue gas passages, burners, heat exchangers, cou- pling 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 additional lubrication. These motors can be identified by the absence of oil ports on each end of the motor.

•Inspect and change or clean air filters(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 connections(s) at the furnace to en- sure it is physically sound, sealed to the furnace casing, and ter- minates outside the space containing the furnace.

•Inspect electrical wiring, connections, 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 assem- bly 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.

•Examine the physical support of the furnace. Support should be sound with not 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 checking a few things yourself before calling for service.

FOR INSUFFICIENT AIRFLOW:

•Check for dirty air filter(s).

•Check 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.

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

•Is thermostat set on 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.)

NOTE: Turn off electrical supply before continuing with checklist.

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

•Check manual reset flame rollout switch located on the burner box. (See Fig. 3 or 4.) If furnace has experienced high temper- ature 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 Fur- nace” section in this manual.

•Check for obstructions around the vent termination outside the structure.

If the furnace still fails to operate, call your service representa- tive.

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 ser- vice representative.

This furnace has a light-emitting-diode (LED) status code dis- play 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.

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