Weil-McLain A14 Error Code — What It Means
There is no official Weil-McLain boiler error code designated as A14 in the manufacturer’s published fault lists. Weil-McLain boilers (Ultra, ECO, CGa, Aqua Balance, Evergreen) use documented codes such as E01 (ignition failure), E03 (high-limit or overheat), E04 (low water cutoff), and E09 (gas valve fault). The code you are seeing may be a misread, a model-specific diagnostic identifier not published as a standard error, or a display issue.
Because A14 is not recognized, the specific cause, sensor values, and safe repair steps cannot be provided. Attempting to guess the fault meaning risks incorrect diagnosis and unsafe work on a gas-fired, pressurized system. You should confirm the exact fault message on the control module display, note your boiler model and serial number, and consult the official service manual or contact Weil-McLain warranty support at 1-800-654-2109, Option 4.
Common Causes
- Misread or phantom display code (~40%) The display may be showing a transient or model-specific diagnostic identifier that is not a standard published fault code.
- Actual fault is E03 (high-limit or overheat) (~20%) Outlet water temperature exceeded 210°F, often due to a faulty supply or return temperature sensor or wiring issue.
- Actual fault is E04 (low water cutoff) (~15%) System pressure dropped below approximately 10 PSI due to leaks or insufficient fill.
- Actual fault is E01 (ignition failure) (~15%) No flame detected after three ignition attempts, often due to gas supply interruption, dirty flame sensor, or failed ignitor.
- Control board firmware or display glitch (~10%) A software bug or corrupted memory is displaying an invalid code that requires a power cycle or board reset.
Quick Diagnosis
Answer these to narrow it down fast.
Does the control display show a code starting with E (such as E01, E03, E04, or E09)?
No: The code may be model-specific or a display error. Continue to the diagnostics menu to retrieve the actual fault history.
Can you enter the contractor diagnostics menu and view past error codes?
No: Power-cycle the boiler (turn off the service switch for 30 seconds, then back on) and check if the display clears or shows a recognized code.
Is system pressure reading below 12 PSI on the gauge?
No: The fault is likely ignition, sensor, or control-related. Contact a licensed heating technician for safe gas and electrical diagnosis.
Step-by-Step Fix
- Turn off power to the boiler at the service switch and wait 30 seconds for the control to fully reset.
- Check the display when you restore power. Write down the exact fault code and any accompanying text (E01, E03, E04, etc.).
- Enter the diagnostics menu by holding the up and down arrow buttons simultaneously until the contractor menu appears, then navigate to Diagnostics → Errors → Lockout History 1. Note any manual-reset or auto-reset codes shown.
- Record the boiler model and serial number from the barcode sticker on the jacket (Ultra, ECO, CGa, Aqua Balance, Evergreen, etc.).
- Consult the official Weil-McLain service manual for your model (available from the manufacturer or a licensed contractor) to look up the documented fault code.
- If the code remains unrecognized, contact Weil-McLain warranty support at 1-800-654-2109, Option 4, and provide the exact display message, model, and serial number.
- Do not attempt repairs on gas, combustion, or high-voltage components yourself. Schedule a visit with a licensed heating technician to diagnose and resolve the actual fault safely.
Parts Often Needed
| Part | Notes |
|---|---|
| Replacement component | Amazon | verify fitment for your exact model |
When to Call a Pro
Call a licensed heating professional immediately if the boiler is locked out and you cannot confirm a recognized error code, if you smell gas or see water leaks, or if the display shows E01, E03, E04, or E09. Gas boilers operate under pressure and involve combustion, high-voltage ignition, and safety interlocks that require specialized training and test equipment. Weil-McLain explicitly requires that gas, sensor, and pressurized-side faults be diagnosed and repaired by a licensed gas fitter under applicable safety codes. Attempting DIY repairs on an unrecognized code risks voiding your warranty, carbon monoxide exposure, and equipment damage.
Rough cost: A pro service call runs about $150-400.