🔧Boilers Error Codes
Gas and condensing boiler error codes. Lockout faults, ignition failures, pressure switch errors, and combustion safety codes for residential and commercial boilers including Burnham and Weil-McLain.
41 guides
Section editor: Error Code Fixes Editorial Team ·
Recent Boilers Guides
-
Weil-McLain A164 Error Code - Causes & Fix
A164 does not appear in Weil-McLain documentation. Verify the display-it may be A44 (bad temp sensor). Check wiring and reset the boiler.
-
Weil-McLain Boiler A163 Error - Causes & Fix
A163 is not a standard Weil-McLain code. Check your model's display and manual for the exact fault. Often an ignition or sensor issue.
-
Weil-McLain A136 Error - Causes & Fix
A136 error meaning varies by Weil-McLain model. Check your service manual or call a tech. Most common: sensor fault or control issue.
-
Weil-McLain Boiler A115 Error - Causes & Fix
A115 is not a standard Weil-McLain code. Check your model's manual for the exact fault. Most boiler shutdowns trace to ignition or sensor issues.
-
Weil-McLain A110 Error - Causes & Fix
A110 is not a standard Weil-McLain fault code. You likely see A01 (no ignition). Check gas supply, reset the boiler, and verify spark.
-
Weil-McLain Boiler A26 Error - Causes & Fix
A26 error meaning varies by Weil-McLain model. Check your boiler's manual for the exact definition. Most often a sensor or limit switch fault.
-
Weil-McLain 019 Error Code - Causes & Fix
Code 019 means ignition failure or lockout. The boiler failed to light. Most common fix: clean or replace the flame sensor rod.
-
Weil-McLain A17 Error Code - Causes & Fix
A17 is not a documented Weil-McLain code. Check for misread display (17, A1, or other brand) and consult your manual for the actual code.
-
Burnham/U.S. Boiler Fault Code 2 — Ignition Lockout Fix
Fault Code 2 on a Burnham (now U.S. Boiler Company) 7-Series, 8-Series, ESC2, or Alpine gas-fired boiler indicates an ignition lockout — the integrated...
-
Lochinvar Knight E02 — High Limit / Stack Temp Fix
E02 on a Lochinvar Knight wall-hung (WHN, WBN) or Knight XL floor-mount condensing boiler indicates a high limit or stack temperature lockout. The SMART...
-
Navien NPE/NCB Code E003 — Ignition Failure Fix
E003 on a Navien NPE-A, NPE-S, NCB, or NFC series condensing combi/boiler indicates an ignition failure — the control attempted ignition through its full...
-
Weil-McLain Code 1 — No Flame Sensed Fix
Code 1 on a Weil-McLain Gold or Ultra Series boiler means the boiler attempted ignition but did not prove flame within the trial-for-ignition window...
Showing 12 of 41 boilers guides. Browse all guides →