Hi all


We have a glow-worm boiler in the kitchen, which is used to heat the
water and supply the radiators when heating is required.
Upstairs in the 2nd bedroom there is a cold water tank and hot water tank
with an electric emersion heater.(never used).
Today on returning home from work, the hot water has come on via the combi
boiler(no heating on) but the radiators downstairs were all red hot, even
though the timer was set to hot water only and the thermostat in the hallway
was on minimum.

Any ideas???

have done a Google and the general consensus seems to be the gravity return
valve????
If this is the culprit, where is it located and is it easily sorted..

Thanks for you help


Tony

"Tony & Debs" wrote in message
...
Hi all


We have a glow-worm boiler in the kitchen, which is used to heat the
water and supply the radiators when heating is required.
Upstairs in the 2nd bedroom there is a cold water tank and hot water tank
with an electric emersion heater.(never used).
Today on returning home from work, the hot water has come on via the combi
boiler(no heating on) but the radiators downstairs were all red hot, even
though the timer was set to hot water only and the thermostat in the
hallway
was on minimum.

Any ideas???

have done a Google and the general consensus seems to be the gravity
return
valve????
If this is the culprit, where is it located and is it easily sorted..

Thanks for you help


Tony


Do you have more than one boiler?
You mention a combi for the hot water but then talk about gravity return
valve.

"Heliotrope Smith" wrote in message
...

"Tony & Debs" wrote in message
...
Hi all


We have a glow-worm boiler in the kitchen, which is used to heat the
water and supply the radiators when heating is required.
Upstairs in the 2nd bedroom there is a cold water tank and hot water tank
with an electric emersion heater.(never used).
Today on returning home from work, the hot water has come on via the
combi
boiler(no heating on) but the radiators downstairs were all red hot, even
though the timer was set to hot water only and the thermostat in the
hallway
was on minimum.

Any ideas???

have done a Google and the general consensus seems to be the gravity
return
valve????
If this is the culprit, where is it located and is it easily sorted..

Thanks for you help


Tony


Do you have more than one boiler?
You mention a combi for the hot water but then talk about gravity return
valve.


No just a gas boiler in the kitchen and an emersion heater that i never used
upstairs.

On Thu, 21 Jun 2007 22:07:27 GMT, "Tony & Debs"
mused:


"Heliotrope Smith" wrote in message
...

"Tony & Debs" wrote in message
...
Hi all


We have a glow-worm boiler in the kitchen, which is used to heat the
water and supply the radiators when heating is required.
Upstairs in the 2nd bedroom there is a cold water tank and hot water tank
with an electric emersion heater.(never used).
Today on returning home from work, the hot water has come on via the
combi
boiler(no heating on) but the radiators downstairs were all red hot, even
though the timer was set to hot water only and the thermostat in the
hallway
was on minimum.

Any ideas???

have done a Google and the general consensus seems to be the gravity
return
valve????
If this is the culprit, where is it located and is it easily sorted..

Thanks for you help


Tony


Do you have more than one boiler?
You mention a combi for the hot water but then talk about gravity return
valve.


No just a gas boiler in the kitchen and an emersion heater that i never used
upstairs.

What sort of gas boiler? Any model numbers on it?

Not really sure what a gravity return valve is but either you have soe
weird concoction of systems linked together or you have misdescribed
something.
--
Regards,
Stuart.

"Lurch" wrote in message
...
On Thu, 21 Jun 2007 22:07:27 GMT, "Tony & Debs"
mused:


"Heliotrope Smith" wrote in message
...

"Tony & Debs" wrote in message
...
Hi all


We have a glow-worm boiler in the kitchen, which is used to heat the
water and supply the radiators when heating is required.
Upstairs in the 2nd bedroom there is a cold water tank and hot water
tank
with an electric emersion heater.(never used).
Today on returning home from work, the hot water has come on via the
combi
boiler(no heating on) but the radiators downstairs were all red hot,
even
though the timer was set to hot water only and the thermostat in the
hallway
was on minimum.

Any ideas???

have done a Google and the general consensus seems to be the gravity
return
valve????
If this is the culprit, where is it located and is it easily sorted..

Thanks for you help


Tony


Do you have more than one boiler?
You mention a combi for the hot water but then talk about gravity return
valve.


No just a gas boiler in the kitchen and an emersion heater that i never
used
upstairs.

What sort of gas boiler? Any model numbers on it?

Not really sure what a gravity return valve is but either you have soe
weird concoction of systems linked together or you have misdescribed
something.
--
Regards,
Stuart.

Its a Glowworm spacesaver about 20 years old..

The message
from Lurch contains these words:

Not really sure what a gravity return valve is but either you have soe
weird concoction of systems linked together or you have misdescribed
something.

Surely a gravity return valve would be a valve in the system to prevent
gravity circulation in the heating system when the heating is off. (Does
anyone fit such things these days?)

What is the betting that the OPs problem is the usual cause of distress
- a 3 port valve that won't behave properly. No use looking to me for
advice on those though. I only know sufficient about them to avoid
installing one for myself. :-)

--
Roger Chapman

"Tony & Debs" wrote in message
...
Hi all


We have a glow-worm boiler in the kitchen, which is used to heat the
water and supply the radiators when heating is required.
Upstairs in the 2nd bedroom there is a cold water tank and hot water tank
with an electric emersion heater.(never used).
Today on returning home from work, the hot water has come on via the combi
boiler(no heating on) but the radiators downstairs were all red hot, even
though the timer was set to hot water only and the thermostat in the
hallway
was on minimum.

Any ideas???

have done a Google and the general consensus seems to be the gravity
return
valve????
If this is the culprit, where is it located and is it easily sorted..

Thanks for you help


Tony

What you describe is not a combi boiler

combi's do not usually have water tanks and were not commonly installed 20
years ago as regs around that time required a separate water pressurisation
vessel

Sounds like the motorised valve is stuck
this valve moves the flow of water between the feed to the tank and the feed
to the rads and is electrically controlled by the programmer and thermostat

Tony