Vaillant Boiler Clicking

[Paul17088071]

Hi all

I have a problem with my vaillant boiler, it isn’t a combi boiler as I have a water tank upstairs.

It seems to make an extremely loud noise now and again, in the form of what sounds like a few clicks, and water emptying from the boiler. This will last around ten seconds. The display says it is up to 104 degrees, which I am unsure as to why as I haven’t sent it to even reach beyond 75.

Does anyone know what could cause this? Any advice much appreciated

Thanks

 

[Gasguru]

Model?
What does the pressure gauge show?
Is the filling loop open or failing (the Ecotecs are hopeless).

 

[Paul17088071]

Thanks for the rreply

It is an eco fit pure, and it’s just come up with an error code F83. I reset the boiler an hour ago!

 

[Gasguru]

It sounds like a circulation problem...either insufficient system pressure (or iffy sensor), failed pump etc.
What pressure does the display show...
The pressure sensors on all Vaillants are not known for their quality.

 

[CBW]

You might want to check the smaller of the two tanks in the loft for water.

 

[Paul17088071]

Vaillant are asking me to get a hive heating engineer to check the configuration first to ensure there isn’t a miscommunication, could that be a possible problem?

 

[Gasguru]

Ah, I mis-read that it was a combi.
Is this a heat only or system boiler?
Where is the water leaking from the boiler?

 

[Paul17088071]

I believe it is a system boiler. In in terms of leaking, it’s not physically coming out anywhere. Stood next to the boiler unit downstairs, it sounds like it’s emptying or filling with water.

Stood upstairs next to the water tank it sounds like a war zone when it clicks, thuds etc. I am wondering whether it’s something to do with hive?...i read the thermostat should be more than 30cm from the water tank?...previous owner installed it and it’s only about 10cm from the tank. Would this cause a problem?

Thanks

 

[CBW]

Vaillant are asking me to get a hive heating engineer to check the configuration first to ensure there isn’t a miscommunication, could that be a possible problem?

Highly unlikely

 

[CBW]

Ok so if it’s a system boiler, you will have a pressure gauge and a filling loop. Has the loop been left open? And what is the current pressure. Are the flow and return valves open? Could be a fault on a motorised valve. A picture often tells a 1000 words. If it’s open vented refer to post number 5.

 

[Paul17088071]

I can’t see a filling loop, the underneath of the boiler looks like this (see picture).

Hive central heating is set to 15 degree, it’s currently 19 in the house yet the boiler is still firing up the central heating, boiler temperature then goes rapidly from 75 to 104 and then cuts out with the egg timer and that terrible noise from what I can only describe as a war zone.

Does this help?

Really appreciate it

thanks

 

[Gasguru]

You've got a heat only boiler ( a system boiler would contain a pump, expansion vessel, pressure sensor, pressure relief valve etc).
Have a look in the airing cupboard near the cylinder...you might find the pump, zone valves, pressure gauge and filling loop (if it's a sealed system).
Post pics...

 

[CBW]

Ok with the hive off, you’re getting a demand from elsewhere. You may have a stuck motorised valve or a link left in the boiler (which can be quite common), but please do not remove the cover to find this out. What pipes do you have coming from the top of the boiler? Do you know what the pressure is if it has a gauge?

 

[Paul17088071]

This is above the boiler. Oh I won’t touch the cover!

 

[CBW]

Oh I won’t touch the cover!

Good man