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Table C-4:
System and General Troubleshooting continued
Problem
Possible Cause
Remedy
Airflow biocked or dirty air filter.
Clean or replace air filter.
Supply air temperature too
hot.
Insufficient airflow.
Check all dampers. Open closed dampers including registers in unused
rooms. Check system temperature rise. If temperature rise is too high,
speed up blower fan.
Excess airflow.
Check system temperature rise. Slow down blower fan if necessary.
Supply air temperature too
cool.
Excessive duct losses.
Check supply air ductwork. Seal leaky joints and seams. Insulate
ductwork if necessary.
Fan control "fan on" setting too
Supply air temperature too
low.
cool during first moments of
Increase differential between fan control "fan off" and "fan on" settings.
(L4064B, L6064A fan / limit controls only, no adjustments available for
L4064W fan / limit control). Register air deflectors may heip.
furnace cycle.
j
Excessive duct losses.
Check supply air ductwork. Seal leaky joints and seams. Insulate
ductwork if necessary.
FINAL CHECK OUT
ENSURE THAT ALL SAFETY DEVICES AND
ELECTRICAL COMPONENTS HAVE BEEN
SET FOR NORMAL OPERATION. ENSURE
THAT ALL ELECTRICAL CONNECTIONS
ARE TIGHT AND THAT THE WIRING IS
SECURE.
A
IMPORTANT:
Please
ensure
that the homeowner
is informed
and
understands:
1.
Where
the circuit breaker or fuse
is located
in
the main electrical panel.
2.
Where
the furnace
switch
is located,
and
the
switch "on" and "off" positions if not obvious.
27
3.
Where the oil shut-off valve from the oil storage
tank is located.
4.
How
to
operate
the
thermostat,
and
other
related accessories.
5.
How to operate the manual
reset button on the
primary control, and especially when not to push the
reset button.
6.
How
and where
to visually inspect the venting
system for leaks or other problems.
7.
How to inspect, clean and replace the air filter,
and other homeowner maintenance procedures.
8.
Who
to call for emergency
service and
routine
annual service.
9.
The terms and conditions of the manufacturer's
warranty and the contractor's warranty.
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