What does FLOW_SW_NOT_CLOSED mean on PEERLESS PureFire PF-140 Boiler?
S
Sarah YoderSep 14, 2025
If your PEERLESS Boiler displays 'FLOW_SW_NOT_CLOSED':
1. Check for electrical continuity between wires connected to terminals 9 & 10 from the field supplied flow switch.
2. If there is no continuity, check to be sure the circulator is working.
3. If the circulator is working correctly, check the flow switch.
C
Chris FloresAug 25, 2025
How do I fix a blocked condensate drain on my PEERLESS PureFire PF-140 Boiler?
J
Jennifer MossAug 25, 2025
If your PEERLESS Boiler shows a 'BLOCKED CONDENSATE DRAIN' error, check the condensate tanks, hoses, condensate switch, and harness.
T
Todd ShermanAug 25, 2025
What to check if my PEERLESS PureFire PF-140 shows a low water error?
V
Valerie LevineAug 26, 2025
Check the boiler water level, low water cut-off, and harness. If a LWCO is not used, a jumper should be placed between terminals #9 and #10, LWCO Contact.
K
Karen LoveAug 27, 2025
What to do if there is a false flame detected before ignition in my PEERLESS Boiler?
J
Jennifer HancockAug 27, 2025
If you're experiencing a false flame detected before ignition with your PEERLESS Boiler, check the flame sensor and igniter to ensure there are no shorts to ground.
P
Patricia WalkerAug 27, 2025
How to fix hot/neutral reversed error on PEERLESS Boiler?
B
Brian VargasAug 27, 2025
If your PEERLESS Boiler displays the error 'HOT/NEUTRAL REVERSED', verify the polarity of the incoming wiring and check the boiler ground and harness.
M
Mark DixonSep 12, 2025
What to do if PEERLESS PureFire PF-140 showing low water?
E
Eric RiceSep 12, 2025
If your PEERLESS Boiler displays 'LOW WATER', check the boiler water level, low water cut-off, and harness. If a LWCO is not used, a jumper should be placed between terminals #9 and #10, LWCO Contact.
J
Jeremiah StevensSep 10, 2025
How to troubleshoot stack sensor short error on PEERLESS PureFire PF-140 Boiler?
D
David BowmanSep 10, 2025
If your PEERLESS Boiler displays the error 'STACK SENSOR SHORT', check the harness and sensor.
R
Ryan MyersSep 12, 2025
How to fix DHW sensor short error on PEERLESS Boiler?
D
Derrick JacksonSep 12, 2025
If your PEERLESS Boiler displays the error 'DHW SENSOR SHORT', check the harness and sensor.
J
Jeffrey SimmonsSep 3, 2025
How to troubleshoot high return temp on PEERLESS Boiler?
B
blake42Sep 3, 2025
If your PEERLESS Boiler displays 'HIGH RETURN TEMP', check for reversed supply and return piping or a pump installed backwards.
D
Dr. April ChristensenSep 1, 2025
Why is the return higher than supply on my PEERLESS Boiler?
N
Nicholas MaddenSep 2, 2025
If you see 'RETURN HIGHER THAN SUPPLY' on your PEERLESS Boiler, check the system piping to ensure water enters the return connection and exits the supply connection correctly. Also, compare the supply thermistor reading to the temperature gauge; if they don’t match, replace the supply thermistor.