Hot water venting out from overflow


Postby da51dbr0wn » Fri Nov 28, 2008 11:42 am

Every time my thermostat switches off the hot water the system vents hot water out of the vent. The temprature of my hot water is also scalding hot.

Any advice please
da51dbr0wn
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Postby Steve the gas » Sat Nov 29, 2008 6:38 am

Hi,

Turn down any HW stat you have eg on boiler and/or cylinder stat.
Then post back pls
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Postby da51dbr0wn » Sun Nov 30, 2008 9:32 am

Steve,

Thanks for the reply.

I have done as you requested and it is worse, in that it occours more frequently.
da51dbr0wn
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Joined: Fri Nov 28, 2008 11:33 am


Postby htg engineer » Sun Nov 30, 2008 1:20 pm

Type of system ?

Make/model of boiler ?

If it's a gravity HW system - replace boiler stat.


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Postby da51dbr0wn » Tue Dec 02, 2008 7:13 pm

Htg,

The boiler is a Potterton Flamingo 50,

I am assuming it is a gravity fed system, as it is not on a pressurised ring main.

Off to the attic and down to the plumbing suppliers tommorrow for a new thermostat.

Am I right in assuming the following:

Switch of the electricity at the mains,

Switch off the boiler,

Drain down

Replace the part,

Reverse the proceedure.
da51dbr0wn
Posts: 3
Joined: Fri Nov 28, 2008 11:33 am


Postby htg engineer » Thu Dec 04, 2008 5:49 pm

I'm pretty sure it will be a gravity HW system.
So what are you going into the attic for ? immersion maybe ?
- that's not the boiler stat.

Drain system ? not normally necessary to change boiler stat, as the phial will sit in a dry pocket.


htg
htg engineer
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