Before You Request Aservice Call - Bryant CONDENSING GAS FURNACE 340MAV User's Information Manual

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:
39
• 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?
40
• 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 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 in
combustion area. (See Fig. 3 or 4.) If
furnace has experienced high tempera-
ture conditions, this switch will shut
off the furnace. Reset it by pushing the
button on the switch. If it trips again,
41
10
shut down the furnace and call for ser-
vice. See "Shutting Down Your Fur-
nace" section in this manual.
• Check for obstructions around the
vent termination outside the structure.
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 electri-
cal power supply will terminate LED
diagnostic code display and erase the
memory.
To decipher the meaning of the LED
code, and suggested action, the follow-
ing cross-reference can be used.