What is your longest running Combi Boiler without ever needing Service - excluding maintenance.

i think this is the reinforcing the parts of the plane that don't have bullet holes problem.

I had a Bosch service call recently , The customer mentioned first call in 11 years..The electrodes walked and I believe were the original .. I was amazed ..

sounds like it is spark rather than hsi

if i knew what level of cleaning it needed before i had it apart i would be a lot more likely to do it.

This is easy for me and unbelievable. Baxi. I hate to say it but its true, I have had more than a few go 10 + years without touching them. I got a call from what I thought was a former customer because I never heard from them. He let me know, that they hadn't called because there was no need. Maintenance conversation aside, I went over and found it running great. Needed a cleaning, and a flame rod and igniter. Here's the pic. I dont understand it, this thing was on LP, and only did radiant and hot water. It sees the hours, and should need more love. Baxi… I dont like them, but man they have held up for me, so I dont even know why I dont like them.

As much as I hate to admit this, I recently serviced a Navien combi that was installed in 2013 and had never been touched. Family of 6 using DHW and a 4 loop radiant floor in the basement. Flushed the HX and it showed almost no signs of buildup, then replaced the pressure switch after a long talk with tech support. All better

I have a number of Cosmogas/ Embassy Axia boilers still out there.

Installed 2005-2007.

They are an atmospheric set up. Pretty bulletproof. Igniters and the occasional need to top off water is about all they get.

A complete service/ teardown would not be fun… day long process.

I have done a few the really issue is parts are very hard to find.

Now we need to make a reverse thread. Shortest unit run time, before needing service. Or maybe most service calls within the first year, two, five.....

Can't know the exact date of install because there was no record, but they only made this serial between 03-09 viessmann wb2 little combi. customer went out to it after an ice storm left our area without power for a week or more. Must have taken a surge or something when the power came back on because the board was toasted. I've seen a lot make it 10 years with no issue, the problem is most of the time when you show up to those they actually haven't even had annual service to the burner in those 10 years and the problems begin stacking up. Good brands that are installed well and don't get hit by dirty power can safely last 10 years not being touched at all, 15+ with some annual service (or a great deal of luck). Probably the most common early parts to "fail" are those little Grundfos flow sensors in many brands, usually its just debris in there causing the thing to not read correctly, a filter helps mitigate this. In my experience the primary problems I have with combis have to do with customer expectations not parts failures. There's a bad habit of swapping out a tank for a tankless or combi and the customer doesn't like waiting for hot water, so you build a recirc for them and the thing short cycles itself to an early death because they never call for maintenance.

Home owner here. Had my Weil McClain ultra installed Oct. 4, 2004 and believe I have only had one service repair call since original install date. Of course the maintenance schedule has been followed, which has been every other year. Is my Weil McClane Ultra living on borrowed time????? Combi meaning DHW and heating, correct?

GB 142 isn't a combi as far as I know. Nut then I could becerong

20+ years is an impressive amount of time for a combi. I can't say that it's past it's expiration date but I would be concerned about the age of it.