22
Burner Flame Without Motor Running
a. Gas valve stuck open, check gas valve for proper operation
(replace if necessary) and inspect heat exchanger.
b. Check for 115 volts to the combustion blower motor;
replace if necessary.
c. If no power to combustion blower then check wiring and
control module; replace if necessary.
Circulation Air Blower Will Not Operate Even Though The
Burner Does Operate
a. Check thermostat “G” wiring.
b. Check wiring to motor.
c. Check for a defective motor.
Figure 35. Periodic Cleaning
WARNING:
Do not obstruct any return air openings, including
the grille on the furnace. To do so may cause the
furnace to activate the high limit and shut down,
or it may cause asphyxiation.
!
Figure 36. Roof Jack
WARNING:
Use of furnace or air conditioning components
that are not included in the certification of this
appliance may create a hazard, invalidate the
certification, and, in many states, make installations
illegal. Listed NORDYNE air conditioning
components are specified on the furnace label.
!
18. Maintenance
By Homeowner
1. Return Air - On some closet installations the return air
opening to the furnace may be on the floor, on the door,
on the side wall of the closet, or some combination of
these. The upper grille on the front of the furnace admits
return air to the blower. Return air must be provided back
to the circulating blower in order to provide air distribution.
2. Filters - At least twice each season (more often in dusty
areas) remove and clean the air filters with a vacuum or
with warm water and soap. Reinstall when dry. Also
clean dust and lint around furnace and in the furnace
vestibule. (Figure 35.)
3. Seasonal Service Information - During extremely cold
weather, ice may form on the furnace roof jack. Small
amounts of ice forming on the roof jack will present no
problems to proper furnace operation. Excessive ice
formation could restrict the combustion air supply to the
burner, causing inefficient burner operation. If excessive
ice has formed on the air inlet or exhaust portions of the
roof jack, it must be carefully removed (Figure 36).
By Serviceman
All furnaces need periodic service at the beginning of each
heating season. Call your serviceman to:
a. Remove the air circulator and clean all dust and lint from
the unit with a stiff bristle brush.
b. Inspect the combustion chamber blower compartment,
flue collar and Roof Jack.
c. Check the gas valve (if applicable) and fuel line
connections for leaks.
d. Make any adjustments necessary for good operation.
ADDITIONAL OIL
FURNACE MAINTENANCE
In addition to the preceding, the following should be performed
by a qualified service contractor at least once each season for
oil-fired furnaces:
a. Replace the oil nozzle with the type nozzle specified for
your furnace.
b. Clean, adjust and replace if necessary the spark electrodes.
c. Reset the nozzle/drawer assembly to factory
specifications.
d. Clean the inside of the furnace heat exchanger and
replace the combustion liner if necessary.
e. Clean or replace the oil filter element at the oil tank.
f. Adjust the burner for top efficiency and check to make
sure all fittings are leak-tight.
Check for
Ice Here
