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All installations and services must be performed by qualified service personnel.
4. Turn service switch to furnace "ON". If burner starts and runs, but stops again on lockout, it may be necessary to
bleed the lines or make burner combustion air adjustments. Contact a qualified service person to adjust and start
burner.
E. FILTER CLEANING AND LOCATION:
The air filters should be inspected each month and cleaned when dirty. Cleaning the air filters frequently may
reduce airborne contaminants from entering the furnace and depositing in the furnace, duct system and home.
cWARNING: To avoid injury from moving parts, hot surfaces, or electrical shock, shut
off the power to the furnace before removing any furnace access doors to service the air
filters.
The filter rack will be located between the return air plenum and the return air opening on the side of the furnace,
refer to figure 18. Slide the dirty filter out, clean it with a mild soap and water solution. Make sure filter is
thoroughly dry before replacing.
Fig. 18: Location of the air filter on the typical highboy furnace.
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