model 16E - wished I had never brought it. Wastage of cold water is a major problem for me, at least 5 to 9 litres of cold water just for 2 showers in the morning, then the kitchen cold water add that on pure wastage. spoke to a plumber who installs another well known brand rang gas works and a technician came and re-tuned it, shut this did that and is now working like it should have been.

I changed from solar to instant gas in an effort to save water. What a let down. I need to run my 'instant' hot water twice as long as my old solar took to heat up. The cost was exhorbitant. Over $3000. now I have to pay for the power and waste twice as much water.
I have to change my review and apologise to Bosh. The installer informed me it was working correctly. After a year of miserable showers I found a real plumber who said the water was travelling back & forth unnecessarily in too small pipes. He has fixed that problem. However when set at 50 degrees it reaches about 43 and stilll takes a while to get to the kitchen. Still wish I'd stuck with Solar.

17e has been great! One unit supplying hot water to a food van,another, domestic supply.
Both units will take some effort to restart should they continue to be used on an empty cylinder.
The restart usually takes 5 minutes with some switching on and off of the power supply.
Best to try and avoid the run-out situation. Simple cylinder changing does not effect units.
Both units 2 plus years old.

The water Takes a long time to get hot, we have to turn the tap on and off several times before we get hot water, when we run at low flows it goes cold, very expensive to repair( the plumber showed me what the spare part cost him, $369 )...I would never recommend a Bosch to anyone,

Same issue as most here. Having to replace the board after only 5 years!!!!!
Costing me $264 for a plumber to look at it and couldn't see a problem (of course he switched it off to look at it, causing it to reset and work fine when he turned it on again), and then $620 incl labour to replace the board. $884!!!!
A brand new Rinnai 18 installed would be $1199.
DO NOT BUY A BOSCH!

whenever we have a shower its really hard to get temp to stay on corrct setting almost like it blows out then re starts I just don't know, very frustrating.

I was recommended to change to a shower head with flow greater than 9l/m to maintain heat in a shower. I can't find one. Everything seems to be a max of 9l/m (wels3).Does this mean that bosch highflow 17e shouldn't be on the market?

Just moved in a new house for two weeks,with Bosch high flow 17e hot water system, one cylinder of my LPG-45 KGs has gone empty, call el gas, they told me about 3 months for one cylinder gas. I also smell the stink in my room, feel dizzy which I thought it caused by recent bush fire.....Switch off the cylinder and call the builder....

Leaks

Moved into rental property with 17e with the remote temp control option. Must have been installed correctly as works brilliantly. Never run out of hot water, can set the temp however we want. Great.
Temp and flow rate control, never runs out of hot water. So far my guess is that it saves on gas, however haven't had the bill or other gas system to compare to.
Occasionally slight temperature change, barely noticeable.

I would not recommend the Bosch 17e to anyone. It is so dangerous to be in the shower and have the water suddenly go cold. This normally happens three times during my shower which should last about 3 minutes. I would add that no other taps in the home are being used at this time so nothing is affecting the water pressure. When we finally got a technician here to check the system, he said that we do not know how to take a shower. That is how much they care about after sales service.
Absolutely nothing
I have been unable to have a proper shower for the six months we have had this piece of rubbish. The water continually goes cold. A two minute shower takes me 20 minutes.