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I have a prothem 100ec boiler fires and temp starts to rise and get between 58 and 60 then for no reason the gas flame increase and boiler over heats and then cuts out when cooled down boiler fires ag

I have a prothem 100ec boiler fires and temp starts to rise and get between 58 and 60 then for no reason the gas flame increase and boiler over heats and then cuts out when cooled down boiler fires again

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  • 94 Answers

It sounds like you have a bad thermocouple. This apparatus senses when the temp is too low and sends an electric signal to turn on the gas to the heater. When it reaches it's preset temperature it sends a electric signal and the gas is turned off. It is best to call a repairman to fix this for a couple of reasons. One, he usually has the thrmocouple with him so you don;t have to wait on a part. Two, you"re messing with gas and if you screw up you can blow up the house and you along with it. Three it is a relatively quick and inexpensive service call, plus if there is anything else wrong he can fix it, save another service call and save you tons on your fuel costs.

Posted on Dec 10, 2014

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: fault light flashing 1 flash per second

Prior to writing the above fault I had asked the owner to turn the boiler temp controller , for the heating side, down just a fraction . I was phoned this morning to tell me that the boiler had stayed on allnight with no fault light . After consulting with the plumber who fitted the system it appears that there might not be a room stat ,

Posted on Dec 01, 2008

tborn6
  • 700 Answers

SOURCE: Boiler problems

heres a copy of the serviceing manuel for the unit. just click on the link and download the manual. http://www.ariston.co.uk/uploads/doc482c2cada6e71.pdf good luck

Posted on Jan 11, 2009

  • 150 Answers

SOURCE: alpha 240e boiler wont fire up for hot water, will for heating

most likely the diverter valve.. when hot tap turned on the movement of the water through the valve operates a diaphragm which pushes a pin/button//switch to tell the boiler to fire up

Posted on Sep 02, 2009

mrhotandcold
  • 248 Answers

SOURCE: Combi boiler will not fire up for hot water or heating.

check tops of spindles at radiator valves for leaks easy repaired set pressure to .8bar setting at 1.5 may be make overpressure and blow off through high/pressure releasese valve

Posted on Dec 03, 2009

  • 1 Answer

SOURCE: Protherm 100EC boiler not firing up

I have aProtherm 100EC....four plumbers and six days on two kids 5 and 4 and still freezing!!Changed pcb on advice of one and inginition pcb on anothers advice.Fan still wont start and so no ignition and all it was was electric went off for two hrs!!HELP PLEASE it has to be something simple,surely!!
Paul the builder

Posted on Jan 18, 2010

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Have protherm 100ec boiler british gas has replaced almost every part boiler will fire temp gauge rises to about 55 flame increase in strenght for about 10sec then boiler cuts out also they keep trying...


Any other symptoms? Is the fault apparent only when drawing hot water? Does the boiler re-light later? Alarm messages? F1? F3 for example?
It may well need a powerflush, but it's best to find out before spending big money with BG.....wish I could get away with charging that much for a flush!!!
FYV

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1 Answer

Pressure gauge reading zero


Hello Mark
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When you turn on hot water tap the boiler fires up hot water for a few seconds the water becomes cold the boiler flame goes out then fires up again. when the heating on the flames stays on then off then on...


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Protherm 100EC boiler not firing up


You likely have a flame sensor problem.

If you can wath the ignition proccess, see if you ever notice a flame. If yes, and it then shuts downm, you have a flame sensor failure, replace the sensor and clean the flame burners and orifices.

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Gas boiler


hi sounds as though the system is sludged up & needs power flushing.the reason is that the water cannot circulate so over heats & pumps into the header tank.
expect to pay approx 350 400 pounds to have it properly cleansed, it will restore the system efficiency.
The other area worth considering is that it could be a faulty pump os that when th eboiler fires it cannot circulate so in turn expands & vents into the tank.

My advise is to arrange for a corgi engineer to sort it out for you.

Kindly

Richie

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