WEIL-MCLAIN Ultra Boilers

Weil-McLain Ultra Boiler Overview

The Weil-McLain Ultra is an Energy Star rated condensing gas boiler with an AFUE between 92 and 93.3% for regular conditions, and 98% for conditions related to low temperatures. It is a two-stage induced draft boiler that has what Weil-Mclain call “integrated PhD (Precision Hydronic Data) Technology”, a system that “initiates efficient and ongoing hydronic heating”. The design of the Weil McLain Ultra gas boiler is CSA certified.

Weil-McLain has recalled Ultra Series 80,105,155 and 230 boilers manufactured after June 1, 2012 and prior to March 11, 2014. A cap on the boiler manifold can crack and release gas into the home, presenting a risk of fire or explosion. Consumers may contact Weil-McLain at 888-770-7139 for more information.

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Consumer Reviews of Weil-McLain Ultra


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #5 of 10 Weil-McLain Boiler
  • 25.81% of customers recommended

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Weil-McLain Ultra Boiler Reviews

Showing 26-30 of 31 reviews

"No weekend tech support!!!!"

1.0 rating
Very Unsatisfied

My 2 year old boiler (Ultra 155) is refusing to work. So far, 15 man- hours by the plumber who installed it. He can't get a call back from Weil- McLain tech support, and expects not to reach anyone til Monday. (I think it died Thursday night, I discovered the problem Friday night). Manufacturers – do NOT install a computer control if you can't supply 24/7 tech support to the contractors. This is inexcusable. Thank G*d they don't make life support systems.


Concord, MA area

"Would never buy their product again"

1.0 rating
Very Unsatisfied

Major difficulties with the Ultra-310 Series 2 for Aspen, co home. Seems to break down every year requiring replacement of basic building-block parts and modules. Very expensive to replace. Totally dissatisfied and wish my general contractor used a more reliable product

David Kudish

Aspen, CO

"Problems since day one"

1.0 rating
Very Unsatisfied

Purchased 2 Weil-mclain ultras 155 in 2009 and I ve had problems since day one. The first year I had service techs out to my house at least 5 times because water temp sensors kept failing now one of them is having blower issues which also won't allow theboiler to function. Frustrated I called my service tech again and now he won't even return my calls so now it's on to the fly by night guys who charge $125 an hour to stare at my boilers and try to figure out the problem. But at the least I will not ever purchase Weil-mclain again and they wonder why no one buys American anymore where's the pride gone?



"Weil-McLean Boiler"

5.0 rating
Very Satisfied

We had the Weil-McLean Ultra 155 installed over 5 years ago and are very satisfied with it. However, it is difficult to find qualified service technicians to work on it. As for honoring their warranty, I was very impressed with the customer relations rep that I spoke with.

S. Preast


1.0 rating
Very Unsatisfied

Do not buy Weil-McLain Ultra Boilers! They do not work and Weil-McLain will not stand behind them. We have had one for 2 years that has not run correctly since it was put in. Weil-Mclain reps were out to look and verified it was installed correctly but it still will not work properly. WM's course of action is to blame the contractor who put it in even though they have already verified that the install was correct.


Other Ultra Reviews

Comments about Weil-McLain gas boilers on HVAC-Talk message boards and heating contractor sites are generally positive:

  • In one hvac-talk.com forum, one service tech says that the circulator problem on one Weil McLain furnace is due to a bad motor. Heat is strong in every location except one. This heater is strong and persistent, but the circulator requires attention.
  • In another hvac-talk.com forum, another tech observes that the Weil McLain boiler works very well, especially through 3-way valves, and produces considerable heat. A couple of other forum guests agreed with this assessment.
  • In yet another hvac-talk.com forum, both techs and guests agree that Weil McLain provides good multiple relay distribution, providing that the circulator and thermostats are up to par.

Ultra Warranty

Weil McLain Ultra boilers come with a 5-year parts and labor warranty. The unit must be registered within 30 days of installation to qualify for the warranty.

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