ideal classic ff350,stalling after 20mins
- Thread starter kimsim
- Start date
thats not what i would call logical fault finding! haha. what is happening then? is boiler trying to fire up and failing? are external controls calling? room stat cylinder stat? what type of system do you have etc.
I know its not a combi! i meant is it s or y plan. when it cuts off feel the pipes above boiler if they are red hot then i think its overheating and you have a circulation problem. if the heat isnt getting away from the boiler quick enough it will keep cycling on off on off and it will be noisy bit of banging etc. if that is the case its probably the pump.
If it was overheating I would expect the overheat trip switch on the boiler to need resetting each time.
When it stops running, check for 240VAC at the boiler terminal. This will tell you if it is receiving a call still from the external controls.
Can you pinpoint where the 'squealing' is coming from? eg the top of the boiler, or perhaps the pump wherever that is fitted?
When it stops running, check for 240VAC at the boiler terminal. This will tell you if it is receiving a call still from the external controls.
Can you pinpoint where the 'squealing' is coming from? eg the top of the boiler, or perhaps the pump wherever that is fitted?
o.k well it can be reaching temperature as there are circulation issues.
im a spark so ive proved voltage at the controls,the noise seems 2 b from the centre towards the top,the room stat is fine so wen the boiler shuts down the room stat doesnt click this proving that it is shutn down and not just reaching room temp,the pump is on the top floor the boiler on the ground floor 3 storery house
o.k do the following.
1. check your heating tank is full make sure system hasn't run dry.
2. take screw out of pump if it is that type. push a screw driver into the propeller. is it easy to stop the prop. if yes or if it isnt running pump in knackered. if this is ok and motorised valve is open it could be a blocked cold feed.
1. check your heating tank is full make sure system hasn't run dry.
2. take screw out of pump if it is that type. push a screw driver into the propeller. is it easy to stop the prop. if yes or if it isnt running pump in knackered. if this is ok and motorised valve is open it could be a blocked cold feed.
you will most probably have two tanks one for hot water which will be a large tank and a small tank for heating. check this. if fan is seized the boiler wont fire.
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