water help no hot water

[jpbroad1970]

hi we have an issue with our heating and water system . new flow switch and new pump , system bled , all done by a professional but still no hot water or heating. when the plumber left yesterday we had boiling radiators and some hot water although the heating was switched off. my suspicion is diverter valve but unsure as to why nothing is working again now. boiler tries to kick in but says FD error (flow)

would be really happy for some advice as we have been 4 weeks without hot water no and the Mrs isn't happy.

thanks in advance
John

 

[Aire]

Thanks very much, going to try the original plumber as it's his responsibility really but if I have no joy I will message you.

Could anyone please confirm the drain down method, in my mind it's lock off the tank in the loft then turn on hot taps to drain down tank , when that's drained drain the hot water loop from the drain tap at boiler then hey presto should be clear to take off diverter valve.

No need to drain hot water, your hot water and heating water are seperateted you'll have two tanks in the loft, close off the small one. Turn off power supply to boiler, open drain valve, wait for water to stop, then open bleeds on upstairs rads, wait for water to stop, then open bleeds on downstairs rads. Don't forget to add inhibitor back in the system when filling back up. Also check the condition of the water when you drain down. If it's mucky it might give a clue as to why your system is having issues

 

[jpbroad1970]

No need to drain hot water, your hot water and heating water are seperateted you'll have two tanks in the loft, close off the small one. Turn off power supply to boiler, open drain valve, wait for water to stop, then open bleeds on upstairs rads, wait for water to stop, then open bleeds on downstairs rads. Don't forget to add inhibitor back in the system when filling back up. Also check the condition of the water when you drain down. If it's mucky it might give a clue as to why your system is having issues

Thanks very much, got me head confused on the water heating loop lol. I'm happy doing that , I have drained the upstairs rads before do I have to drain the downstairs rads too?

 

[Aire]

If your 3 way valve is above your downstairs rads then no you won't need to drain them.

 

[jpbroad1970]

If your 3 way valve is above your downstairs rads then no you won't need to drain them.

3 way valve is on is in airing cupboard upstairs, boiler is downstairs we only have 2 floors.

 

[jpbroad1970]

Hi, the saga continues, plumber came back and put new diverter valve on, we have come back off holiday and no hot water, pump works diverter valve works , as said before new flow sensor fitted too, only thing I noticed when I cleaned magna clean is metal fragments attached , will try to add a picture. We are going to get a different plumber, could I be right in thinking all the pipes could be caked up in the fragments. We are at a loss now as the best route to follow as if my understanding is correct it's really just a simple flow circuit.

 

[Burger]

What’s your cylinder thermostat set to?

 

[jpbroad1970]

What’s your cylinder thermostat set to?

That's set 70 degrees at the moment but the hot water tank is stone cold

Thanks

 

[Burger]

That's set 70 degrees at the moment but the hot water tank is stone cold

Thanks

And have you checked your 3 port again? If that's coming out of your filter, could be blocking your 3 port 😱

 

[jpbroad1970]

And have you checked your 3 port again? If that's coming out of your filter, could be blocking your 3 port 😱

I tried the new 3 port on manual setting and that didn't help, also tried heating and that's not functioning although you can hear the valve motor move. I know is difficult to diagnose on the internet but it's doing is in. If I knew how I could flush it through I would try myself but other than that it's midweek untill we can get a new plumber out. There can't be much else in the system can there. Again I'm guessing but there must be a blockage somewhere. You can hear the water start to flow and you can feel it throughout the pipes to tank but I suppose that could be pump vibration.

 

[Burger]

Ok so you've tried 3 port in manual, are any pipes getting hot? Does the boiler fire up? Can you get hot water from immersion?

 

[jpbroad1970]

Nothing is getting hot , boiler won't fire just keeps coming up flow fault. I don't know if the emersion is still connected as I can see wires or where a heating element would be.

 

[jpbroad1970]

We don't have an Immersion heater, looks like it's been took out but the switch is still there.

 

[Burger]

Did your plumber have to drain anything to change 3 port? If it’s a flow fault it could be the pump.

 

[jpbroad1970]

I presume I can wire in a Immersion heater, I'm just trying to find the length I can use. Attached image is my tank info.

 

[jpbroad1970]

Did your plumber have to drain anything to change 3 port? If it’s a flow fault it could be the pump.

We have new pump , new boiler flow switch, new 3 way valve and no luck lol

 

[Burger]

I presume I can wire in a Immersion heater, I'm just trying to find the length I can use. Attached image is my tank info.

Yes you can, you’d need a 27” one. Are you ok with electrics?

 

[Burger]

We have new pump , new boiler flow switch, new 3 way valve and no luck lol

Looking at the shiote in the filter, could be stopping it. Can you take a photo of your pump (if it’s near cylinder) and 3 port layout? Just to maybe get a different perspective.

 

[jpbroad1970]

Yes you can, you’d need a 27” one. Are you ok with electrics?

Yeah I'm good with electrics, just something for temp and emergency measures like this.

 

[jpbroad1970]

Looking at the shiote in the filter, could be stopping it. Can you take a photo of your pump (if it’s near cylinder) and 3 port layout? Just to maybe get a different perspective.

Best I can get I'm afraid no David bailey

 

[Burger]

Hard to tell from that photo, but I’m unsure if that first valve on the pump is fully open? Check both are fully open (anti-clockwise). Also check your boiler thermostat is turned up.