Oil burner issue

iphone6

Fired up boiler last week and tripped the electrics so did the usually trouble shotting.
Found three problems, no water in the rads the pump was leaking water from the old wilo pump from the screw and thermostat was melted . So drained down the system to fit new pump and replace valves because there old and rusted.

Since then boiler stays on but only heats rads Luke warm and stays on but burner shuts off like it's over heating new thermostat was fitted too .

I have bleed all rads no air locks in system

Any ideas what may be issue why rads not heating up the max.

Wearb

Which stat was melted? What caused it to melt? When was boiler last serviced? What is happening to make you think boiler is over heating? Did you replace the pump with one of the same power?
Answering those questions will give us a starting point in diagnosing the problem.

iphone6

Wearb wrote: »

Which stat was melted? What caused it to melt? When was boiler last serviced? What is happening to make you think boiler is over heating? Did you replace the pump with one of the same power?
Answering those questions will give us a starting point in diagnosing the problem.

It's a orange thermostat that's wired to the pump and plugged in. Plastic one not the larger one connected to the burner, it melted because of heat from boiler it's located close by.

Boiler serviced maybe two years ago.

Yes pump has same power .

I think it s over heating because runs for ten minutes then boiler cuts out and system is still on for the hour programmed. I need to start the system by pushing down on a green button on the bigger thermostat that's connected to the boiler .

Thanks for reply

Wearb

You seem to have a problem with water circulation. Make sure your pump is running during this on period. Make sure the valves on the pump are open. Another possibility is that the whole system is sludged up. Or if its a pressurised system, it may be low in water. Check that you have water coming out of the bleed on the highest radiator.

iphone6

Wearb wrote: »

You seem to have a problem with water circulation. Make sure your pump is running during this on period. Make sure the valves on the pump are open. Another possibility is that the whole system is sludged up. Or if its a pressurised system, it may be low in water. Check that you have water coming out of the bleed on the highest radiator.

From draining the system before I placed the grundfos pump on I have filled all the rads and heard for quite awhile the boiler filling up this has stopped so thought everything be full.
I have bleed all up stairs rooms and getting some heat but not much, how would I address the water circulation problem the pump is on and working .

Been sludges up I would of came across this once the system was drained all clean water space out.

How do I know if pressurised system.

Wearb

Did you have black water coming out when you drained it down? Did you previously have any cold spots on any rads? Did you remove any radiators to hose them through? Did you let air out of the top of the boiler as you filled it.

Don't forget to add inhibitor when you have it all sorted. It should be added to a clean system.

If you have water coming out the bleed screw of your highest rad, then that part might be ok. It may be air in boiler or pump. Did you bleed the pump?

What was the source of the water used to refill the system?

It is overdue a service.

iphone6

Wearb wrote: »

Did you have black water coming out when you drained it down? Did you previously have any cold spots on any rads? Did you remove any radiators to hose them through? Did you let air out of the top of the boiler as you filled it.

Don't forget to add inhibitor when you have it all sorted. It should be added to a clean system.

If you have water coming out the bleed screw of your highest rad, then that part might be ok. It may be air in boiler or pump. Did you bleed the pump?

What was the source of the water used to refill the system?

It is overdue a service.

It's a new pump was told you don't bleed them I can't see where you could either as there no screw there just electrics to show wattage of pump.

I filled the system by the header tank in the attic also didn't add anything to the system to be honest didn't come across my mind.

There was black stuff first time I put in pump but was clear. I didn't touch rads just to bleed. There is a value I loosened and that let air out at top of boiler.

Thanks again for the info it's much appreciated

Wearb

There are a few other questions that you haven't answered. Also have you followed instructions regarding orientation of the pump?

iphone6

Wearb wrote: »

There are a few other questions that you haven't answered. Also have you followed instructions regarding orientation of the pump?

Yes I have fitted pump correctly. And haven't taken radiators off to wash out.

I think at a guess I have the wrong temp set on thermostat set too low. Reason when I took it apart to attach wires was set at 36degrees and just put it back so could be set too low as I don't know fully correct position to be set for max temp

Wearb

Make sure your pump is running during this on period.

Copied from second sentence in post 4

iphone6

Wearb wrote: »

Make sure your pump is running during this on period.

Copied from second sentence in post 4

It's is I can feel tiny vibration and warm water is on both sides of the pipe

iphone6

This is what I'm working with. Orange stay connected with pump other one to burner

Wearb

If I am looking at that pump from the correct angle, it is incorrectly orientated. Also, did you make sure that the flow arrow was pointing in the same direction as the previous one.

iphone6

Wearb wrote: »

If I am looking at that pump from the correct angle, it is incorrectly orientated. Also, did you make sure that the flow arrow was pointing in the same direction as the previous one.

I was sure but now seconding guessing myself . It's pointing away from boiler. I can hear boiler water bubbling inside the init itself. If I press green switch after it cuts out it fires up again for 10 more minS.
Thanks for your help so far

Wearb

Is it on the pipe going to the bottom or top of the boiler?
Have a look at the installation guide that came with the pump, for orientation guidelines.

iphone6

That's the direction of old pump

iphone6

Going to the bottom, if was on the wrong way would it cause boiler to cut out and allow the pipe to be hot at both sides

Wearb

Arrow should be towards the boiler

Wearb

Have a look at the installation guide that came with the pump, for orientation guidelines.


Don't ignore above or you may be buying another pump.

iphone6

Thanks for your help I will get it done tomorrow evening and post a update .

Would you think this will resolve the issue from what I have posted before,

Wearb

It most likely will solve it.

jimf

there is only so much advice you can relay without being on site and seeing everything for yourself

if im totally honest with you your boiler has really seen better days and looks far from safe

iphone6

Swapping the pump around seems to of done the job, have to bleed the radiators more as one or two cold.

Last question the header tank is getting water from a open pipe over it the water is warm so not cold or from mains it's been like that the last few hours any ideas why this be happening.

Wearb

You may have some very poor plumbing that is causing this. It could be just the pump being too powerful or your pipes to the expansion tank in the wrong place in relation to the pump and each other.

There are ways of remedying this, but you need to get a plumber who can see the overall installation to decide what is causing it and the best solution.

Don't ignore it or it will eventually ruin your heating system.

iphone6

Wearb wrote: »

You may have some very poor plumbing that is causing this. It could be just the pump being too powerful or your pipes to the expansion tank in the wrong place in relation to the pump and each other.

There are ways of remedying this, but you need to get a plumber who can see the overall installation to decide what is causing it and the best solution.

Don't ignore it or it will eventually ruin your heating system.

I have the pump on to the highest setting so o will put it on to a lower one first. Just rather have one more go at it before call in expert .

Wearb

If you get it sorted by turning down the pump, then good. After that (as an extra check) if you sometimes turn off some rads, then do that as a test to see if that causes pumping over when they are off. If not then happy days.

As said by JimF and myself, get it properly serviced when you get the plumbing sorted.