Heat Controller, Inc.
MGD-B SERIES GAS FURNACE
Installation Instructions
Mortex Products Inc. / Fort Worth, TX 76106
G18D Installation Instructions
G18D Series Gas Furnace
INSTALLATION INSTRUCTIONS
12
IF FURNACE FAILS TO OPERATE PROPERLY:
1. Check setting on wall thermostat and the position of
the HEAT-COOL switch if air conditioning is installed.
2. Check to make sure that electrical power is on at the
furnace and the furnace breaker has not tripped.
3. Make sure that the filters are clean and return grills
are not obstructed. The supply registers should be
open.
4. Be sure that the furnace flue and inlet piping has not
been obstructed and is open. If the cause for failure
is not obvious, do not attempt to service the furnace
yourself. Call a qualified service agency or the gas
supplier.
FINAL PROCEDURE
AIR CONDITIONING SYSTEMS
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