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Protherm 100ec Combi Boiler - Water only hot every 30 seconds or so - DIYbanter If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Home » DIYbanter forum » Do - it - Yourself » UK diy Protherm 100ec Combi Boiler - Water only hot every 30 seconds or so Author Name Remember Me? Password Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. Tags: 100ec, boiler, combi, every, protherm, seconds, water Protherm 100ec Combi Boiler - Water only hot every 30 seconds or so « Previous Thread | Next Thread » Thread Tools Display Modes #1 November 16th 04, 04:56 PM Tone external usenet poster Posts: n/a Protherm 100ec Combi Boiler - Water only hot every 30 seconds or so Hi, ive recently bought a house with what ive been told is less than 3 years old protherm combi boiler. The hot water from this is very hit and miss despite the central heatin being excellent. If i turn a tap on full, the hot water goes warm, then hot, then warm, then cold, then a bit warmer then hot and repeats the cycle, but not in the same order always. Ive tried running the taps only half open to see if the flow affects it and sometimes, if i start at a low flow and keep it low the water gets extremely hot, other times, its as hit and miss as when the taps are fully open. Confused? yeah, me too :-) There also seems to be confusion in the boiler itself, because the led display apparently should display the dhw temp when the taps are on, but sometimes this goes to 42 or more, yet the water coming out of the tap isnt hot? when it goes down to low 30's it might be rnning hotter to the touch than it was when the display said 40??!! please help :-) Tone Ads #2 November 16th 04, 09:09 PM John external usenet poster Posts: n/a "Tone" wrote in message om... Hi, ive recently bought a house with what ive been told is less than 3 years old protherm combi boiler. The hot water from this is very hit and miss despite the central heatin being excellent. If i turn a tap on full, the hot water goes warm, then hot, then warm, then cold, then a bit warmer then hot and repeats the cycle, but not in the same order always. Ive tried running the taps only half open to see if the flow affects it and sometimes, if i start at a low flow and keep it low the water gets extremely hot, other times, its as hit and miss as when the taps are fully open. Confused? yeah, me too :-) There also seems to be confusion in the boiler itself, because the led display apparently should display the dhw temp when the taps are on, but sometimes this goes to 42 or more, yet the water coming out of the tap isnt hot? when it goes down to low 30's it might be rnning hotter to the touch than it was when the display said 40??!! I'm not familiar with this model but the symptoms sound like a temperature sensor problem, the boiler controls probably aren't getting a signal to control the flame modulation and it is running up to a limit stat (separate stat) turning off the flame, cooling down and starting again. Is the installation and service manual available? Try to locate the DHW temperature sensor and ensure that it is in good contact with the hot water pipe/heat exchanger within the boiler, also that it has a good electrical connection to the wiring and if you have a half decent meter check the resistance of the sensor both hot and cold. John #3 November 17th 04, 10:48 AM Tone external usenet poster Posts: n/a thanks John, further tests last night show that the following sequence occurs. Hot water tpa on - Bolier fires up, water goes warm, after around 10-15 seconds, flames visible within the boiler go out, water goes cold, 10-15 seconds again flames come back on water warms up - repeat repeat repeat. Changing the temperature of the DHW onthe boiler form anything between 40-60 degrees (the full range)does not affect this. Turning the hot water taps on more or less doesnt affect this. Having the Central heating on doesnt change things either. Are the suggestions you've made fairly easy/safe to perform? This will be my first attempt at maintaining a boiler of any kind :-s Tone #4 November 17th 04, 01:27 PM John external usenet poster Posts: n/a "Tone" wrote in message om... thanks John, further tests last night show that the following sequence occurs. Hot water tpa on - Bolier fires up, water goes warm, after around 10-15 seconds, flames visible within the boiler go out, water goes cold, 10-15 seconds again flames come back on water warms up - repeat repeat repeat. Changing the temperature of the DHW onthe boiler form anything between 40-60 degrees (the full range)does not affect this. Turning the hot water taps on more or less doesnt affect this. Having the Central heating on doesnt change things either. Are the suggestions you've made fairly easy/safe to perform? This will be my first attempt at maintaining a boiler of any kind :-s Not being familiar with this model I'm not sure that I ought to push you into the innards. Have you taken the decor casing off to see whats under it yet? In the meantime I'll take a look on Google for the Protherm 100ec John #5 November 17th 04, 09:16 PM John external usenet poster Posts: n/a "John" wrote in message ... "Tone" wrote in message om... thanks John, further tests last night show that the following sequence occurs. Hot water tpa on - Bolier fires up, water goes warm, after around 10-15 seconds, flames visible within the boiler go out, water goes cold, 10-15 seconds again flames come back on water warms up - repeat repeat repeat. Changing the temperature of the DHW onthe boiler form anything between 40-60 degrees (the full range)does not affect this. Turning the hot water taps on more or less doesnt affect this. Having the Central heating on doesnt change things either. Are the suggestions you've made fairly easy/safe to perform? This will be my first attempt at maintaining a boiler of any kind :-s Not being familiar with this model I'm not sure that I ought to push you into the innards. Have you taken the decor casing off to see whats under it yet? In the meantime I'll take a look on Google for the Protherm 100ec Google is throwing up all sorts of spurious leads for Protherm. Has anyone any ideas as to the location of the manufacturer? John #6 November 18th 04, 10:38 PM John external usenet poster Posts: n/a "John" wrote in message news:... "Tone" wrote in message om... thanks John, further tests last night show that the following sequence occurs. Hot water tpa on - Bolier fires up, water goes warm, after around 10-15 seconds, flames visible within the boiler go out, water goes cold, 10-15 seconds again flames come back on water warms up - repeat repeat repeat. Changing the temperature of the DHW onthe boiler form anything between 40-60 degrees (the full range)does not affect this. Turning the hot water taps on more or less doesnt affect this. Having the Central heating on doesnt change things either. Are the suggestions you've made fairly easy/safe to perform? This will be my first attempt at maintaining a boiler of any kind :-s Not being familiar with this model I'm not sure that I ought to push you into the innards. Have you taken the decor casing off to see whats under it yet? In the meantime I'll take a look on Google for the Protherm 100ec A few blind alleys but after some time I found a contact phone number for Protherm/ProRad 01771 828100 Unfortunately this rings out as number not in use. It may be that this company is an ex parrot? John #7 November 19th 04, 09:35 AM Tone external usenet poster Posts: n/a the company that provides support was indeed charging at a premium rate. 4 mins at 50p/min to tell me i neeeded an engineer to come out and look at it! Great. the installation company is/was heatcall (www.heatcall.co.uk) - ive checked their website but still want to see if there is anything i can do to resolve this myself before getting the experts in. it definitely stays lit for about 10s then goes off. Could this be caused by scaling on the parts? where i live is a bad area for scaling... Tone #8 November 19th 04, 07:41 PM Ed Sirett external usenet poster Posts: n/a On Fri, 19 Nov 2004 01:35:03 -0800, Tone wrote: the company that provides support was indeed charging at a premium rate. 4 mins at 50p/min to tell me i neeeded an engineer to come out and look at it! Great. the installation company is/was heatcall (www.heatcall.co.uk) - ive checked their website but still want to see if there is anything i can do to resolve this myself before getting the experts in. it definitely stays lit for about 10s then goes off. Could this be caused by scaling on the parts? where i live is a bad area for scaling... Quite possibly. See my posting under the "Combi-boiler Ho****er 'heat dump' too hot" thread. -- Ed Sirett - Property maintainer and registered gas fitter. The FAQ for uk.diy is at www.diyfaq.org.uk Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html Ed Sirett #9 December 16th 04, 11:53 AM tr@totalise.co.uk external usenet poster Posts: n/a Ed Sirett wrote: On Fri, 19 Nov 2004 01:35:03 -0800, Tone wrote: the company that provides support was indeed charging at a premium rate. 4 mins at 50p/min to tell me i neeeded an engineer to come out and look at it! Great. the installation company is/was heatcall (www.heatcall.co.uk) - ive checked their website but still want to see if there is anything i can do to resolve this myself before getting the experts in. it definitely stays lit for about 10s then goes off. Could this be caused by scaling on the parts? where i live is a bad area for scaling... Quite possibly. See my posting under the "Combi-boiler Ho****er 'heat dump' too hot" thread. -- Ed Sirett - Property maintainer and registered gas fitter. The FAQ for uk.diy is at www.diyfaq.org.uk Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html tr@totalise.co.uk « Previous Thread | Next Thread » Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts vB code is On Smilies are On [IMG] code is On HTML code is Off Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Do - it - Yourself UK diy Metalworking Woodworking Woodturning Electronics Repair Home Repair Photos and Plans to Share Woodworking Plans and Photos Electronic Schematics About DIYbanter About this forum Similar Threads Thread Thread Starter Forum Replies Last Post New CH System advice. Mark Trueman UK diy 20 October 12th 04 06:29 PM Heat banks (again!) 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