For weeks now my mains 24e boiler keep loosing water pressur. i have to top up .and then let air out all the rediaters .and maintane presser on 2 to get the hot water and centrel heating working .there are no leaks in the house .and no sign of any leak under the boiler .but condensing water pipe does have some water coming out .i had the engneer to look at it all he could say was that may have leeks under the floor as boiler should not loose any water .please advise
Generally preesure problems are caused by the following- obviously a leak, bleeding of rads without topping up the pressure, pressure relief valve passing( probably an integral part to the boiler), or potentially a problem with the expansion vesell.
the expansion vessel is a tank which
holds water and air- it should be pressurised with air by about 10 psi or up to 1bar, if the diaphragm has split this ill cause pressure problems all day long
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I have a BAXI combi Instant 105 HE bolier. It has been very cold for the past week and the hot water is not working (though the heating is). I have cleared the overflow flu pipe of ice but this has not solved the problem. Any suggestions?
rads not heating could be down to old system ie pipework etc and sludge building up. r there any cold spots on rads? when boiler turning off do u mean going to reset? if so could be over heat prob at boiler . there should be a pressure pipe coming from boiler going to outside if its a combi. if this is leaking your expansion vessel might need re charged as this is where the water will be going.
im an engineer and recently had exactly the same thing with this ariston boiler, i found out it was the the 'air pressure switch', this is a switch which is part of the ignition, it works in conjuction with the fan. when the boiler fires up the air pressure switch makes, if its faulty it can break the circuit mid flow and cause the burner to shut down therefore giving intermittent hot water and heating, theres a possibility that the aps tubes may be damaged as well so ensure they'e condition is good. hope this helps you
sounds like your diverter valve is passing on the boiler, this diverts the heat either to the rads or to the taps, if its passing through the heating chanel it'll heat up the rads- may also be a scaled up secondary heat exchanger, hope this helps you
i need to know boiler specifics- make and model but sounds like either the air pressure switch seized or the main printed circuit board, if the boiler has an overheat thermostat please ensure that the little red button hasnt popped out because this will prvent the boiler firing up- refer to the manufacturers instructions for location of the o/heat stat
sounds like youve topped the pressure up too much, the boiler needs to be on 1 bar pressure from a cold state, thats the max really you want to increase it too, in operation the boiler pressure increases due to heat expansion but sounds like you may have more of a problem, if your renting the property then its the landlords duty to ensure your boiler works and its safe- consult the landlord asap and they sohould help you out