Nordyne O4MD Installation, Operation And Maintenance Manual page 28

Problem Possible Cause Remedy
Airflow blocked or dirty air
Clean or replace air filter.
filter.
Supply air Check all dampers. Open closed dampers including
temperature too hot. Insufficient airflow, registers in unused rooms. Check system temperature
rise. If temperature rise is too high, speed up blower
fan.
Check system temperature rise. Slow down blower fan
Excess airflow.
Supply air if necessary.
temperature too cool. Excessive duct losses. Check supply air ductwork. Seal leaky joints and
seams. Insulate ductwork if necessary.
Supply air Fan control "fan on" No adjustments available for L4064W fan / limit
temperature too cool control). Register air deflectors may help.
during first moments setting too low.
of furnace cycle. Excessive duct losses. Check supply air ductwork. Seal leaky joints and
seams. Insulate ductwork if necessary.
NOTES
28 153B0801