Weil-McLain A114 Error Code — What It Means
A114 is not a verified Weil-McLain boiler error code in the manufacturer’s published documentation. The code you are seeing may be model-specific to a particular control board or may be misread from the display. Weil-McLain boilers use different control systems depending on the series, and each has its own fault code list. Without knowing your exact model and control type, it is impossible to confirm what A114 means on your unit.
The most common ignition and combustion lockout codes on Weil-McLain boilers typically relate to no gas flow, a dirty flame sensor, or a failed ignitor. However, these are general troubleshooting areas and not confirmed as the meaning of A114. To proceed safely and accurately, you need the service manual for your specific boiler model. Attempting repairs based on guesswork can waste time, damage components, or create a safety hazard.
Before You Replace Anything
Homeowners often replace the ignitor or gas valve without confirming the exact fault definition. Always pull the fault history from the control’s diagnostic menu and consult the model-specific manual before ordering parts.
Common Causes
- Misread or unreported code (~40%) The display may show a code that looks like A114 but is actually a different alphanumeric sequence, or the code may be specific to a control variant not documented in general Weil-McLain references.
- Model-specific fault not in general documentation (~30%) Some Weil-McLain series use proprietary controls with codes that appear only in the service manual shipped with that model, and A114 may be one of those undocumented faults.
- Gas supply issue (if ignition-related) (~15%) If the code is tied to ignition failure, the gas valve may be closed, the supply pressure too low, or the inlet filter clogged.
- Dirty or failed flame sensor (if ignition-related) (~10%) A fouled flame rod cannot confirm ignition, causing the control to lock out and display a fault.
- Faulty ignitor (if ignition-related) (~5%) A cracked or electrically open ignitor will prevent spark or hot-surface ignition, leading to lockout.
Quick Diagnosis
Answer these to narrow it down fast.
Does the boiler model number plate clearly identify the series (for example Ultra, EG, GV94+)?
No: Take a photo of the model plate and control display, then call a qualified boiler technician who can cross-reference the code with manufacturer resources.
Does the control display show any other codes or allow you to scroll through a fault history?
No: The single code may not provide enough information; a technician will need to access the control's internal diagnostics.
After one reset, does the boiler attempt ignition and then lock out again with the same code?
No: A single transient lockout may have been caused by a power glitch or air in the gas line; monitor the boiler for normal operation.
Step-by-Step Fix
- Record the full model and serial number from the boiler’s data plate, located on the front jacket or inside the control panel.
- Photograph the control display showing the A114 code, including any other text or symbols on the screen.
- Attempt one reset by turning the boiler power switch off for 30 seconds, then back on, and watch whether the boiler goes through a normal ignition sequence or locks out again.
- Access the diagnostics menu on the control (refer to the boiler’s user manual for the button sequence) and scroll through the fault history to see if any additional codes or subcodes are stored.
- Download the service manual for your exact Weil-McLain model from the manufacturer’s website or contact their technical support line with your model number and control type.
- Look up A114 in the fault code table of your service manual; if it does not appear, note the control board part number and call Weil-McLain technical support for clarification.
- Call a licensed boiler technician if the code is not documented or if the manual directs you to check gas pressure, flame sensing current, or ignition components that require specialized tools and training.
Parts Often Needed
| Part | Notes |
|---|---|
| Flame sensor / flame rod | Amazon | Only if the manual confirms A114 is a flame-proving fault and the rod is fouled or electrically open. |
| Hot-surface ignitor or spark ignitor | Amazon | Only if the manual ties A114 to ignition failure and the ignitor tests open or cracked. |
When to Call a Pro
Call a licensed boiler technician immediately if you cannot find A114 in your boiler’s service manual, if the code returns after a single reset, or if you are uncomfortable working with gas appliances. Boiler diagnostics require model-specific knowledge, pressure gauges, multimeters, and sometimes a combustion analyzer. Incorrect troubleshooting can lead to carbon monoxide hazards, gas leaks, or damage to the control board and heat exchanger. A qualified technician will have access to manufacturer technical support, updated fault code databases, and the training to safely test gas valves, flame sensors, and ignition circuits. Do not attempt to bypass safety controls or repeatedly reset a lockout code without understanding the underlying fault.
Rough cost: A pro service call runs about $200-450.