Comments on: Monitor Gas Fired Boilers

By: Mike DIneen

Mike DIneen — Thu, 20 Jan 2022 15:53:02 +0000

In reply to Mike Dineen. I contacted EMB (the manufacturer of the blower unit) and they said it was discontinued in 2011. They couldn't even provide the specs so I could find an equivalent replacement. With this in mind, I decided to rebuild the existing blower. If you decide to go this route, you will need to purchase a 6mm snap ring and (2) 6mm x 16mm x 5mm bearings to replace the originals. Once you remove the lower and take it apart, remove the snap ring at the bottom of the motor, the unit should pull apart. Clean the inside of the housing, I used brake cleaner & a brush. It should be silver when cleaned, mine was black before cleaning. Then replace both bearings and reassemble. All of the parts can be found on Amazon. Good luck.

By: Mike Dineen

Mike Dineen — Mon, 17 Jan 2022 00:09:59 +0000

Do you remember the model number of the motor you purchased?

By: Gary James

Gary James — Sun, 13 Nov 2016 18:58:34 +0000

I installed an MZ25C back in 2001. I’ve had quite a few nagging problems with it, mainly the draft inducer (Blower) has been noisy, sounding like a siren, and weak. It sometimes would fail to produce enough air flow to open the differential pressure switch, and I would come home to a 45 degree house. I resorted to leaving the cover open to reduce intake air resistance – not exactly safe, but it’s the only way it would run. I also had several ignition transformers fail, until I modified the boiler to use the commonly available Becket 51771U oil burner igniter, which works great. I replaced the PVC flue pipe inside the boiler, which had melted and cracked from excess heat caused by the poor flue gas flow.
So now to my reason for posting. After purchasing a replacement boiler (Navien NHB-110) I started to take the MZ apart. I took the blower unit off for the 100th time and looked at the rating plate. It says G2E176-AB75 115VAC, okay – so I take it apart and look at the motor. It says M2E052-BF 230VAC 50/60Hz. 230V !!!!
Now I don’t really want to replace this boiler until next summer (it’s cold here now), so I put everything back together, bought a (230v motor spec) 0.75uf run capacitor (instead of the 2uf used on 115v), and a 115 to 230VAC step-up travel transformer. I wired them into the boiler so that the blower now gets 225VAC when there is a heat call.
Guess what? THE BOILER RUNS GREAT and it’s about 70db quieter.
So thanks Monitor Products Company for the 15 years of aggravation and giant gas bills – all because your QC missed the fact that this boiler clearly could never have passed the CO2 and CO setup, sounded like the Fire Department was arriving and the support that you provided to me was non-existent. Just keep buying crap made in France!

By: Kathy

Kathy — Thu, 08 Mar 2012 15:53:17 +0000

In reply to Paul A. Hello Paul, I have the same boiler and have had continual problems with it. I've left a message with Monitor Products but haven't heard back. Did you ever get your issue resolved? I understand they have discontinued the MZ line.

By: Natalie

Natalie — Fri, 03 Dec 2010 11:03:28 +0000

In reply to Rick. Having trouble with ours as well. Boiler has dumped all the glycol out of it. In process of trying to warranty it. RIck, I suggest checking the condensing collection tube to see if the heat exchanger is leaking fluids. Our problems started with the boiler not firing for domestic hot water. think it's probably a leak which was preventing it from igniting. Has now burned out our pumps and wiring.

By: Rick

Rick — Sat, 27 Nov 2010 13:38:20 +0000

We have an MZ 25C that has ceased to fire. The fan turns on and runs for ~ 5 seconds and then shuts down. Troubleshooting advise will be most welcome, because this is our primary heat source, and we are begiinning to have freezing weather.
Thanks

By: Joseph

Joseph — Fri, 29 May 2009 10:39:29 +0000

Nicholas,

Thanks for stopping by and providing that information for everyone, Good to see you guys are great with customer service!

Joseph

By: Nick Russo

Nick Russo — Wed, 29 Apr 2009 20:29:51 +0000

Hello,
I am the part of Monitor Products Technical support team and am incharge of the warranty department. Paul A says we will nothonor the warranty and i am not sure of this case but what i can say is we give a ten year warranty on our heat exchangers and the condensing pan is apart of the heat exchanger, i do not know why you say you were rejected i have personaly only had two cases were this had happened to the pan and i have given warrantys to both of them. So Paul if you would like to contact me i will look into your warranty claim, 1(800) 524-1102 ext 24 is my direct line. We here at Monitor Products pride ourselves on our customer support and our warrantys so i look forward to hearing from you.

Yours truley, Nicholas Russo Technical Support

By: Paul A

Paul A — Mon, 13 Apr 2009 20:34:32 +0000

I have a monitor MZ40 which has now failed for the second time in 6years. The Stainless steel condensing pan has rusted through and leaks. The monitor reps are refusing to honor the warranty. Beware of these boilers!!