We have had this coffee machine for 2,5 years now and after last descaling it stopped working properly.I think it lost its pressure as it seems to be blocked - the coffee goes very slowly at the beginning and then it does not create a creme, the coffee is disgusting. We have been told that it could be a pump and the boiler - common issue in this model. Can we repair it ourselves? As service is not worth it (we have been told). IF so, how to do it and where to order parts?
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Calcium naturally builds up in tankless water heaters and requires a descaling at least once every 2 years. If the heat exchanger is what has leaked I would just bite the bullet and have the heat exchanger replaced. It is cheaper than a full heater replacement. Then after exchanger is replaced have descaling done in about a week and every two years after. I know it's not as good as the manufacturer paying for it but it's not overly expensive either. Heat exchangers usually run between 2-400 depending on manufacturer. The manufacturer can also direct you to a qualified service technician in your area. Also keep in mind that because you chose a thankless heater you have the ability to replace every single part in the heater and unlike tank owners you don't have to replace the whole thing if it leaks. Good Luck
3) Descaling tankless water heater each year will not restore functionality, or restore efficiency of tankless, nor restore full efficiency to tank-type gas water heater.
4) Bradford White side-by-side testing research comparing their tankless with their tank-type shows that tankless will save $1-8 per month on energy bill vrs ordianry tank-type ....but conclude that tankless 'fall far short of payback' due to maintenance, repair, installation and replacement costs. Study compared full cost, and not just monthly energy bill, since All costs are energy.
Many have tried same, and only a few have been successful, and at best, only temporarily. Believe it or not, I had 3 do the exact same thing last year, corroded right through the meaty part of the fitting, where you would think would be the last place it would eat through. Being in the RV Service trade, I only want to have to fix it once, and don't want to be responsible for any future floods when away from unit so I replace the tank. I've seen some wild fixes over the years, such as a piece of thick rubber hose over the pinhole with a gear clamp (hose clamp) tightened over it to stop the leak, and it was actually working to stop the leak. Your choice, your gamble, but if you decide to try a quick fix, I'd make real sure I shut the pump or city water supply off when your not going to be close by or in the trailer for any amount of time just in case. Hate to come back from a walk and see water running out the door of the trailer. Good Luck.
all brands and models have a flow switch which protects the heat exchanger from overheating, a very common problem is calcium build up in the heat exchanger which reduces flow and causes the flow switch to shut off the burner. Can be fixed by descaling the heat exchanger. We have a kit available at heaterup.com its safe and easy to use.
The only Bosch tankless I have ever touched have been the 3 I have taken out and replaced with Rinnai. I think Bosch/Paloma/etc. have two problems:
1. They do not properly certify technicians before allowing them to install these units.
2. Their product is mediocre at best.
The biggest problem I've seen is that people don't vent them properly. The last one I pulled out had a combined vent length of 55'. 55 FEET! Absurd!
The units was condensing so much inside the vent that it washed out 2 gas control valves in ONE YEAR.
Buy Rinnai, buy Takagi, buy Noritz....maybe even a Navien (new player...time will tell)
Factory certified technicians, preferably equipped to do the gas & plumbing without having to sub it out.
Years of trouble-free hot water.
A rumbling more than a vibration? If one in the same, the heating elements may have calcium build up which causes perculation like the perculator coffee pot which causes the heater to vibrate or rumble. If the elements can be removed they can be cleaned by soaking in lime away or a descaling solution. All said and done it will work like new.