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57 questions from our users

Stephen C.

Stephen C.asked

Electronic Highflow 21e

My unit fires up then almost immediately the fan runs fast and flame goes out. After a few seconds it lights again and then the fan runs fast and flame goes out. If I lower the water flow the water gets Luke walm. The unit was working fine, I ran out of gas. Replaced the cylinder and now this. I have also tried 2 different full gas cylinders

2 answers
Chris
Chris

I really don't know but I wonder if some debris has entered the gas line between the changing of gas cylinder.

Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Stephen, thanks for taking the time to leave your question. We recommend that you try the following: Turn the hot water tap that's closest to your hot water unit on full and leave it running. Once this is done, go to your unit and turn the cold water inlet off (this is usually the second valve from the left underneath your unit). Next, turn the power point to the hot water unit off and wait for around a minute. Afterwards, turn the power point to the unit back on and turn the cold water inlet back on. Check your hot water tap and if the above method does not work, please get in touch with us at 1300 30 70 37 any time from 8am to 6pm (AEDT) and we'll get you in touch with a local service agent to arrange for a service.

Ben R

Ben Rasked

Electronic Highflow 21e

Have a 21e and recent failure. Seems to have water pressure, no changes there, and gas, as we thought the cylinder had run out despite it definitely hasn't.
Have reset several times.
Can hear it engage with water on, can hear the auto starter clicking and fan running, but slight hint of gas smell without the pilot seemingly firing up. The system cycles the auto starter yet doesn't stay heating. After a few cycles it pauses then goes again trying to fire up to an eventual shutdown including fan.
No remote so cannot tell a code.
Need hot water, help at all?

3 answers
Stephen C.
Stephen C.

Did you get it sorted. Sounds the same as my problem

Chris
Chris

Your heater runs on LPG I would guess. You are not the only one to complain that the Bosch water heater stops operating after changing a gas cylinder. When you reset, did you turn the electric power off at the power point? If not then try that for an hour.

Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Ben and Stephen, our sincerest apologies for the delayed response. ieatwords recently updated its platform and due to some initial issues, we were unaware of your question. Due to the nature of your issue, we recommend that you contact us directly at 1300 30 70 37 any time from 8am to 6pm (AEDT) during the weekday and we’ll be able to provide further assistance.

Mike

Mikeasked

Electronic Highflow 21e

My controller switches off after a few minutes. Any ideas?

1 answer
Chris
Chris

You don't say what model controller. If you have only one controller, it must be a Main Controller or Bathroom Controller. The connection points in the heater for these 2 controllers is different.

Blacktom

Blacktomasked

Electronic Highflow 21e

My unit turns itself on and off on a regular basis without any hot taps turned on.
What do I do to stop this s it is just wasting gas?

2 answers
Chris
Chris

Like some modern appliances that involve heating, the fan unit will continue to run after the hot water is turned off. Our oven also does this. When you say the heater turns on I assume it's the cooling fan. Is it doing it for a set time after the hot water is turned off (normal) or does the cooling fan come on by itself (fault)?

Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hello Tom,

Thank you for your enquiry.

The noises you are hearing from the appliance are the water valve operating to predict the optimum position to give the best efficiency for next hot water requirement.

It is not using any gas and a very small amount of power for a few seconds.

Margi B

Margi Basked

Electronic Highflow 21e

We have Bosch 21 E1 M-G, only 2.5 yrs old. Has worked wonderfully til recently. I am finding now that it takes a long long time to get hot water from the tap, I have to fill up a very large container before I start to get warm water. Can you please help? & thank you in advance.

3 answers
Chris
Chris

Has anything changed recently with the household plumbing? When the hot water is turned on can you hear the gas ignite immediately or does it take time (you may have to send someone outside to listen). And how long is a long time?

Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Margi, thank you for your question. We recommend that you get in touch with us at our toll-free number 1300 30 70 37 any time from 8am to 6pm (AEST) during the weekday when you are at home with the unit. If the unit has been working up until this time, we will be able to arrange for a service call. If you would like us to get in contact with you, please fill out our Contact Form located at: , referring to your issue by copying in the link to your review. Once we receive this information, we will get in touch with you within a business day.

Margi B
Margi B

Hi Chris, many thanks for your reply....yes we have had to shut off our laundry taps for about a week, however now plumbing fixed in that area of the home & our hot water is back to normal....we live & learn...thank you :)

Shaun M

Shaun Masked

Electronic Highflow 21e

Hi my 21e varies it's temperature. It starts off warm then gets cold and then gets warm goes cold. Then gets hot but it slight varies it's temperature the whole time after that. It also seems to not have the high flow of water that it used to have. I have cleaned out inline water filter and still no change. Any suggestions?

1 answer
Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Shaun,

Thank your question. As there could be a variety of factors involved, we recommend that you call our team at our toll-free number 1300 30 70 37 any time during the week from 8am to 6pm. We will be able to assist with troubleshooting your issue and arranging for a service call if needed.

Nyree

Nyreeasked

Electronic Highflow 21e

Hi my Bosch highflow 21E is clicking away but not igniting the pilot light. I've reset it several times and checked the gas to no avail. Anything else I should know before handing over my life savings for either a new system or a tradie. I don't know how old the system is, the house is about 10 years old and I don't know the specific model no info passed on when we purchased it seems. Any suggestions?

2 answers
Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Thank you for your question, Nyree. As there could be a range of factors involved, we would recommend calling our customer service team on our toll-free number 1300 30 70 37 any time from 8am to 6pm (AEST) during the weekday to troubleshoot further. One possible cause could be the gas line requires purging and our team can go through this with you which may resolve the issue. If you would like us to get in contact with you, please fill out our Contact Form located at: , referring to your issue by copying in the link to your review. Once we receive this information, we will get in touch with you within a business day.

Ben R
Ben R

Be keen to know the issue as ours is doing similar.... interesting.

Ben C

Ben Casked

Electronic Highflow 21e

We just had our gas turned back on but still cant seem to get hot water. All levers on hot water unit are on also, any help?

2 answers
Chris
Chris

I can only guess at an answer. Turning the electrical power off and on may do it.

Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Ben, thanks for getting in touch with us. We recommend that you contact us at our toll-free number 1300 30 70 37. Our helpful team will take you step-by-step on how to get your hot water back on when you are with your unit. Please note our team is available from 8am to 6pm (AEST) Monday to Friday to assist with your issue.

Jack

Jackasked

Electronic Highflow 21e

I bought a house with with Bosch Highflow 21E . Just used for two weeks. I found the water leaks from the unit, opened the door and have a look, found water spraying from one pipe up from heat exchanger. Is this covered by warranty, how do I fix it? Thanks.

2 answers
Chris
Chris

You need to contact the previous owner to determine how old the heater is. I am not familiar with the internals only that connections come from below the heater. Is the water hot or cold? Can the connection be tightened?

Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Jack,

Thanks for taking the time to write your question. We’d like to investigate your issue further – if you are able to find out when your unit was installed (such as through invoices or receipts from the previous owner), it would be immensely helpful in determining if the unit is still under warranty.

We’d like to get in touch with you to further assist – please send through your contact and location details to [email protected] Please also include an image of the data sticker on your unit (this will have the model and serial number on it – it should be located on the back of your front panel) and take a photo of your hot water system, indicating which pipe the water is leaking from

Jim

Jimasked

Electronic Highflow 21e

We have been away for 10 weeks and now the unit will not fire up. Water ok gas ok. Any ideas?

1 answer
Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Jim,

We would recommend turning your system off and on again.

To do this, you will first need to turn the cold water inlet to your hot water unit off. Once done, turn the power point to your unit off for about one minute.

Once this time has passed, turn your powerpoint to your unit back on and then turn the cold water inlet back on as well.

If this does not resolve your issue, please give us a ring at our toll-free number 1300 30 70 37 Monday to Friday from 8am to 6pm (AEST) and we’ll able to further assist you.

Suel

Suelasked

Electronic Highflow 21e

No hot water for bosch 21E hot water heater. Any help?

2 answers
Bosch Hot Water & Heating
Robert B.Bosch Hot Water & Heating

Hi Suel, thanks for your question. As there could be a variety of factors involved resulting in your issue, we would recommend that you get in touch with our friendly customer service team for further troubleshooting and assistance. If required, we will be able to find an appropriate Bosch service agent for your issue. Our helpful team can be reached from any time between 8am to 6pm (AEST) during the week on our toll-free number 1300 30 70 37.

Chris
Chris

Do you have enough gas pressure, do you have enough water pressure?

Nghia N

Nghia Nasked

Electronic Highflow 21e

21 E hot water running for while and suddenly water stop and power stop I have to turn water on again to make it work. Do you know what is wrong with that please?

No answers
Trent C

Trent Casked

Electronic Highflow 21e

What does error code 16 mean? Every time it comes up the hot water simply stops. Nothing comes out at all. Cold still runs of course.
Trent

1 answer
Chris
Chris

I don't know, it's not an error code I can find. A list of error codes can be found at this site
http://www.jimsplumbing.net.au/bosch-hot-water-system/troubleshooting-guide/error-code-11/

Rock

Rockasked

Electronic Highflow 21e

Hi there,I have a Bosch highflow 21E which has been fine for several years now,a few days ago, after hot tap had been used,as the cooling fan was running the unit would start to make a buzz about every 2 seconds,it does not stop buzzing unless unit is turned off & starts again after hot tap is used again,there are no error numbers on remote controller but it sounds like a warning buzzer,can anyone help? Thanks,Tim.

1 answer
Chris
Chris

I don't have an answer or even a suggestion for this problem.

Marion L

Marion Lasked

Electronic Highflow 21e

Hi had empty gas bottle, that I have only just found out how to turn it over to the other bottle that was sitting there, all good learning,
do I need to do something with the heater unit on the wall the power is on....
but now I still have no hot water, can you please help what to do next
with thanks L

1 answer
Chris
Chris

My heater unit runs on town gas, not bottled gas. The only suggestion I have is to turn off the power to the heater and then turn it back on again after the new gas bottle is connected. Make sure the gas is turned on beforehand.

Terry

Terryasked

Electronic Highflow 21e

Unable to set. Temperature Bosch 22 e highflow hot water. Any ideas?

1 answer
Chris
Chris

Do you have a control panel installed externally from the heater. If so what is the model and model number?

GK.OK

GK.OKasked

Electronic Highflow 21e

I have a BOSCH Highflow 21e. We had our gas turned off for a couple of days (for reasons), and when it was turned back on,the BOSCH wouldn't heat up. 'Have tried the reset procedure several times to no avail. The power is connected, and as far as I can tell, the gas is as well. so would there be any other way to solve this problem?

2 answers
Chris
Chris

This is not a problem I have had. I can only suggest you to check that you actually have gas pressure at the heater connection. You will need a plumber for that. You could loosen a connection at the heater to check for the passing of gas and the smell but if you not familiar with the connections then it's a plumber for you.

GK.OK
GK.OK

Thank you Chris. 'Will definately check that out

Rimu

Rimuasked

Electronic Highflow 21e

My bosch 21 e does not seem to want to ignite on a damp day. Any ideas?

No answers
Saeed

Saeedasked

Electronic Highflow 21e

Hi, I just did some bathroom renovation a couple of days ago and since that time my 21E gas heater turns on when I open the cold water tap!, even when I open a tap in the yard the heater turns on, I called plumber who did a job for me and he said he just put a couple of mixer in the bathroom and he said he didn't touch the heater, so he doesn't know whats happen for my heater. any idea what is the problem?

3 answers
Pete
Pete

Hi Saeed,sounds like you need a professional used to dealing with that unit.
I would start asking at the plumbing supply shop for the best tradie to sort it out.
The places that supply these units know the guys who do the instal as their trade customers.
Sorry I can,t advise any quick fix,other than to check all the connections are correct including recent work,if you are familiar with the location of hot and cold lines.
Pete.

Ellpal
Ellpal

Your plumber has done a cross connection

Plumbdinger88
Plumbdinger88

You probably have an open mixer tap, most likely shower which is capped at the moment during your Reno. Go turn the tap off by pushing the stem up or
Down. Ask your plumber if your not sure. Seen this before the water
Is crossing over through the tap body.

Vaughanbj

Vaughanbjasked

Electronic Highflow 21e

What is error 12??? Why does the manual not specify this stuff far out!

2 answers
Graham B
Graham B

I do not know I think it has to do with ignition try this link maybe if you call they will know. Or try resetting the unit see my previous answers on how.
Cheers
http://www.jimsplumbing.net.au/bosch-hot-water-system/troubleshooting-guide/error-code-11/

Nick D
Nick D

Error 12 is loss of flame signal during use.

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