Joined: 06 Sep 2007 Posts: 7 Location: Renfrewshire, United Kingdom Thanked: 0 times
Posted: Thu Sep 06, 2007 7:10 pm Post Subject:
Vokera Mynute 14se pump noise etc
Hi,
we moved into our flat a few months back, and inherited this old conventional boiler (without any manual as ever).
Up til yesterday, there was minor noise in the middle of the night, even though HW and CH were set to off on the programmer... nothing more than a slight groan really, so thought nothing of it.
3am this morning it started making a very loud grinding/grating noise (sounded like my neighbour was drilling the walls). I swiftly turned off the power, and then double checked this afternoon where the noise was coming from.
I'm pretty sure the pump has failed, as the noise is coming directly from it as well as a fair bit of vibration. Is this likely?
Any ideas what might be the cause of the night time running, which seems to have caused the pump to fail prematurely?
cheers in advance!
Marc
Edit: meant to say as well, the pressure is down at 0.4... when it tried to get going earlier, this went up to 0.7, but dropped again as soon as the boiler decided to give up!
Joined: 06 Sep 2007 Posts: 7 Location: Renfrewshire, United Kingdom Thanked: 0 times
Posted: Thu Sep 06, 2007 7:31 pm Post Subject:
gas4you wrote:
Quite often boilers are pre-programmed to spin the pump every 24hrs to stop it jamming
Could be this.
Fan could also grind stuck.
Oh, so the night-time running might not be a fault?
I've tried to start the boiler this evening, but all I get is the loud noise before it gives up trying (pilot light comes on for 10 secs or so, before shutting off when the pump stops).
Joined: 10 Dec 2003 Posts: 2649 Location: Glasgow, United Kingdom Thanked: 18 times
Posted: Fri Sep 07, 2007 6:12 am Post Subject:
Mark- GET the pressure up to 1 bar ASAP. Pressure appears to be too low. Do not jumo to conclusion that the pump is faulty. Boiler could be damaged beyond economical repair if not looked at soon and is run with system pressure this low.
Joined: 06 Sep 2007 Posts: 7 Location: Renfrewshire, United Kingdom Thanked: 0 times
Posted: Mon Sep 10, 2007 9:16 am Post Subject:
Hi,
thanks for the replies.
I checked the water, and all seems pretty clear.
I bumped up the pressure to 1 bar, and the boiler began to run almost normally (with a regular 'chugging' noise, coming from the pump it seems).
Just as I was closing everything up I noticed a drip though. This drip is coming from the pipework above the pump, behind the bulk of the unit, so I can't quite see where it's actually from.
With this drip, I'm having to raise the pressure every day or so....
EDIT: Could the drip be from the pressure relief pipe (is this above the pump at the back)? When I first turned up the pressure it crept up above 3 bar, and the safety valve popped, with the pressure dropping back down to 1 bar.
Joined: 30 Oct 2006 Posts: 3813 Location: United Kingdom Thanked: 21 times
Posted: Mon Sep 10, 2007 6:18 pm Post Subject:
the drip could be from the auto air vent or if its coming from right behind the boiler it could be the expansion vessel or the connection to it.
another possibility is the connection to the heat exchanger leaking but i cant remember if its still back there on your model. it was on the older ones.
Joined: 06 Sep 2007 Posts: 7 Location: Renfrewshire, United Kingdom Thanked: 0 times
Posted: Wed Sep 12, 2007 7:17 am Post Subject:
Cheers for the help.
Just my luck, the boiler's given up completely now! Won't even fire up (well, apart from once last night when it started up, pressure shot up to 3 bar, and it cut out again).
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