FAQs | Weil-McLain Boilers & Products

Weil-McLain relies solely upon independent heating professionals in your area to install, maintain and troubleshoot Weil-McLain products. We do not employ heating technicians who come out to repair your boiler, nor do we have factory-authorized services. Please contact a heating professional in your area. If needed, your heating contractor can contact our area office or our technical service department for assistance with trouble-shooting problems.

General Product Information

What are the MEA numbers for Weil-McLain products?

MEA applications received after July 1, 2008 are no longer accepted. Application and other submission requirements are being returned and will not be processed under the previous MEA administrative provisions.

The functions of the MEA division have been absorbed by the Office of Technical Certification and Research (OTCR). Refer to the OTCR webpage for information regarding policies and procedures for recognizing materials and equipment under the new administrative provisions. https://www.nyc.gov/site/buildings/codes/technical-certification-research.page

What is a CP number?

This number is used to identify parts for your boiler, track service history, and aid in the registration and warranty claim processes. Your heating professional should have this number handy prior to any troubleshooting with Weil-McLain Technical Support.

Where can the CP number for my boiler be found?

The CP number for your boiler will be printed on a small rectangular barcode sticker on either side of the boiler jacket. For some models such as the ULTRA, the CP number may be inside the boiler jacket near the heat exchanger. If you know your boiler model but do not know where to find your CP on your boiler, use our CP Location Reference Guide to verify location of the CP number by model.

What size boiler is appropriate for my house or business?

Your local heating professional should perform a heat-loss estimate based upon the size and construction of your home before recommending a boiler size and model.

How can I obtain Weil-McLain product manuals?

For current-model boiler manuals, please click here. For discontinued boiler manuals, please click here.

Problems & Troubleshooting

What should I do if my heating system is not working correctly?

Please contact your local heating professional to troubleshoot your system. Your heating professional can contact a Weil-McLain distributor or our technical service department for additional assistance.

How can I get an expert from Weil-McLain to troubleshoot my boiler?

Weil-McLain^® does not employ heating technicians who come out to repair your boiler, nor do we have factory-authorized servicers. We rely upon independent heating professionals in your area to install, maintain and troubleshoot Weil-McLain products. Please contact a heating professional in your area. If needed, your heating contractor can contact our area office or our technical service department for assistance with trouble-shooting problems.

I installed my own boiler. How do I get technical support?

If you are a homeowner who installed your own boiler and are not a professional heating contractor, you must contact the distributor/dealer who sold you the boiler for technical support and warranty action.

Can I get an expert from Weil-McLain to troubleshoot my boiler at home?

Weil-McLain^® relies solely upon independent heating professionals in your area to install, maintain and troubleshoot Weil-McLain products. We do not employ heating technicians who come out to repair your boiler, nor do we have factory-authorized servicers. Please contact a heating professional in your area. If needed, your heating contractor can contact our area office or our technical service department for assistance with trouble-shooting problems.

I just need a part number for a component on my boiler.

Please feel free to use our Parts Selector Tool. You will need to know the model, size, and series of your boiler for most accurate results. For your safety and product longevity, Weil-McLain highly recommends using a heating professional to change any parts or perform any kind of maintenance service.

Warranty Procedures

How do I file a warranty claim?

Your installer or professional heating contractor must contact the Warranty Center at 1-800-654-2109, Option 4 to initiate the warranty claim and provide the following information:

CONTRACTOR INFO: company name, business address, contractor technician name, business phone number and technician’s email address

BOILER/TANK INFO: CP number (WM serial number), model, size, install date, failure date, failure reason, failed part description and failed part number, steam or water boiler and fuel type

JOB SITE: Name of homeowner or business owner, address where boiler or tank is installed, homeowner or business owner’s phone number, homeowner or business owner’s email address

PHOTOS: Photos of the failure location on the boiler or tank

WEIL-MCLAIN DISTRIBUTOR: Name and City/State of Distributor where contractor will pick up replacement part(s)

Upon warranty approval, contractors will go directly to their local Weil-McLain Distributor to obtain a replacement part. The defective item(s) should be returned to the same wholesale distributor where the replacement was picked up. Credits for warranties are processed through the wholesale distributor; Weil-McLain does not reimburse consumers directly.

Who do I call if my boiler is leaking?

If your boiler is leaking, contact your installer or a professional heating contractor of your choice or use our Contractor Locator for a list of contractors in your area. If the boiler is leaking and the component part is under warranty, a heating professional may submit a warranty claim on your behalf.

System Operation

Can I use anti-freeze to protect my system?

Certain types of anti-freeze can be used with Weil-McLain® boilers. We recommend your hired heating professional use an anti-freeze designed for hydronic systems and formulated with inhibited propylene glycol, a non-toxic antifreeze. Do not use automotive antifreeze.

What are the proper temperature settings for my boiler?

The average setting for a forced hot water system is 180°F (lower for in-floor heating). It can be raised as high as 210°F if needed in severe weather. For systems that use coils to heat domestic hot water, the high limit setting is 210°F and the low limit setting 140°F. A differential setting of 15°F is recommended for the optimum amount of domestic hot water.