Status Code 32
LOW-HEAT PRESSURE SWITCH DID NOT CLOSE OR REOPENED - This status code can occur as a result of the low heat pressure switch
LPS not making or the low gas pressure switch LGPS opening. Regardless of which switch is open, the variable speed furnace control will
operate under the scenarios shown below. Keep in mind that whenever the variable speed furnace control shuts unit down, gas remains off or
shuts off immediately and inducer continues running for 15 seconds.
•
LOW HEAT
1. PREPURGE - If the low heat pressure switch LPS does not make within 45 seconds after a call for heat is initiated the variable speed
furnace control starts flashing status code 32, shuts unit down, waits 2 minutes, stops flashing status code 32, and restarts the heating cycle.
2. AFTER IGNITION - If the low heat pressure switch LPS opens after the burners ignite the variable speed furnace control starts flashing
status code 32, shuts unit down, turns on the blower, or continues to operate the blower, at low heat airflow for the selected blower off-delay
period, stops flashing status code 32, and restarts the heating cycle.
STEP
ACTION
YES
NO
GO TO
1
Turn power off, remove blower access panel, and discon-
nect R thermostat lead. Note current setting of setup switch
SW1-2 and then set it to the ON position.
2
2
Turn power on and depress door switch. Use a piece of
tape to hold switch closed.
3
3
Jumper R and W/W1 thermostat terminals.
4
4
Observe operation of the inducer motor for 1 minute before
proceeding to the next step.
5
5
Does status code 32 flash?
9
6
6
Does a different status code flash?
7
35
7
Return setup switch SW1-2 to its original setting and go to
page number indicated in the Index for the section covering
the status code.
INDEX
8
Return setup switch SW1-2 to its original setting and go to
page number indicated in Index for CLEANUP AND
START-UP INSTRUCTIONS.
INDEX
9
Is 24-vac across YELLOW wire to the low heat pressure
switch LPS and C
OM
-24V on variable speed furnace con-
trol?
12
10
10
Is 24-vac across connector terminal PL1-2 and C
OM
-24V on
variable speed furnace control?
11
13
11
You have an open wire or bad terminal on the YELLOW
wire from the variable speed furnace control to the low heat
pressure switch LPS.
12
12
Repair or replace the main wire harness.
8
13
Replace the variable speed furnace control.
8
14
At start of cycle as inducer is ramping up, does low heat
pressure switch LPS make then break?
15
17
15
The problem is either a sag in vent pipe or a clogged drain
trap or line. Also check for improperly plumbed drain tubing
within furnace.
16
16
Fix problem.
8
17
Is 24-vac across ORANGE wire on the low heat pressure
switch LPS and C
OM
-24V on variable speed furnace con-
trol?
18
21
18
Is 24-vac across connector terminal PL1-4 and C
OM
-24V on
variable speed furnace control?
13
19
19
Turn power off and disconnect jumper wire across R and
W/W1 thermostat terminals.
20
20
You have an open circuit between the low heat pressure
switch LPS and the variable speed furnace control. This
includes all the ORANGE wire interconnecting the low heat
pressure switch LPS to the variable speed furnace control.
It also includes the low gas pressure switch LGPS (if used).
Check the continuity across the low gas pressure switch
LGPS (if used).
If there is no continuity check the propane line pressure. If
the propane line pressure is correct replace the low gas
pressure switch LGPS.
Check the continuity of each ORANGE wire interconnecting
the low heat pressure switch LPS and the variable speed
furnace control. Repair open wire or replace harness.
8
21
Turn power off and disconnect jumper wire across R and
W/W1 thermostat terminals.
22
23
