Williams AC2030T Owner's Manual page 35

ISSUE
4. Furnace not producing
sufficient heating.
5. Furnace operates but will
not shut off when room
temperature is attained.
POSSIBLE CAUSE(S)
A. Furnace may be too small
for space being heated
A. Thermostat wiring defective.
B. Thermostat location.
C. Defective thermostat.
CORRECTIVE ACTION
A. Check heat sizing calculations.
A. Thermostat lead wires may be shorted
together, caused by a nail or staple. Check
by removing thermostat leads from
valve terminals.
B. Check thermostat location. If on an
outside wall, or there is a hole in the
wall behind the thermostat, cold air
may be coming in contact with the
thermostat. Relocate.
C. Check thermostat calibration; verify
thermostat temperature reading;
or replace.
AC2030 / AC3040 TOP VENT GAS WALL HEATER
35