Carrier WEATHERMAKER 8000 58ZAV User Manual

Page 21

d. Set thermostat to "call for heat" and wait 1 minute. When

pressure switch is functioning properly, hot surface igniter
should NOT glow and control diagnostic light flashes a
status 31. If hot surface igniter glows when inducer motor
is disconnected, shut down furnace immediately. Deter-
mine reason pressure switch did not function properly and
correct condition.

e. Turn off 115-v power to furnace.
f. Reconnect inducer motor wires, replace control door, and

turn on 115-v power to furnace.

4. Check auxiliary limits (when used).

a. Turn off 115-v power to furnace.
b. Remove blower access door.
c. Disconnect red motor lead at blower speed selector. Mark

terminal for proper reconnection.

d. Replace blower access door.
e. Turn on 115-v power to furnace. Be sure room thermostat

is calling for heat.

f. Allow furnace to operate until auxiliary limit activates, but

DO NOT operate furnace longer than 4 minutes.

g. If furnace operates for 4 minutes, check/replace limit

switch(es).

h. Turn off 115-v power to furnace.
i. Remove blower access door.
j. Reconnect red motor lead, reset switch, and replace door.
k. Turn on 115-v power to furnace.

CHECKLIST

1. Put away tools, instruments, and clean up debris.
2. Verify manual reset switches have continuity.
3. Ensure blower and control access doors are properly installed.
4. Cycle test furnace with room thermostat.
5. Check operation of accessories per manufacturer’s instruc-

tions.

6. Review User’s Manual with owner.
7. Leave literature packet near furnace.