02GF74
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 posted on 28/10/08 at 10:54 AM |
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no hot water...
looks like the gch has gone t%ts up.
when turned on, there is hot water circulating in the radiators but none in the hot water tank.
from what I undersand of the system, there is a electrical valve that diverts water either through the hw tank or to the radiators. I suspect the
valve, that was replaced within the last 2 years is not working.
sound about right?
what can I do to verify it is the valve and say not the controller inside the boiler unit?
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Peteff
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| posted on 28/10/08 at 10:57 AM |
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The thermostatic valve near the tank operates independent of the boiler so if the radiators are getting heat it is not the boiler usually. Does the
tank heating supply run from the same circuit as the radiators?
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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mookaloid
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| posted on 28/10/08 at 11:02 AM |
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You have probably got a 3-way valve which is motorised. The motors go regularly. It is a 3-way connector with a box about 3" across usually
situated near the HW cylinder. it has a lever on the side so you can operate it manually till you get it fixed.
Hope that helps
Cheers
Mark
"That thing you're thinking - it wont be that."
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02GF74
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| posted on 28/10/08 at 11:06 AM |
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I am not next to it but it from what I could tell & from memory, it sits on top of a pipe (inlet?) and has two pipes coming out of it, one is hot
that goes somewhere mysterious (to the radiaotrs?) and other into the hot water tank.
I have to admit it looks cheaps and nasty compared to the one that the BG man replaced &? took with him. 2 yrs doesn't seem that long for
it to go.
There is some sort of tab - lever - in a slot on the side but I did not want to force it.
I take it the whole lot taps into the water system so I would need to figure out how to shut off the water supply to prevent flodding?
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Kev99
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| posted on 28/10/08 at 11:07 AM |
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I would think its like this one here
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02GF74
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| posted on 28/10/08 at 11:09 AM |
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no, mine is blue 
hmmm... looks like it taps into the water system....
will removing the plastic lid and poking around tell me anything? i.e. any way I can test the motor?
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RickRick
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| posted on 28/10/08 at 11:12 AM |
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i'm 90% sure it's just a motor, that drives a spindle that sticks out the top of the valve, so removing it won't lead to water all
over the place i had about 4 of these replaced by british gas, lasting about 6 months each, till i managed to convince them to change the valve body,
which was almost seized up. worked fine for 18 months before the heating was all replaced
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adam1985
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| posted on 28/10/08 at 01:06 PM |
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push the slide lever there will be a little resistance but that will be the spring if its really tough then the little flap inside has stuck if its
the motor then just change the top if its the valve then need to drain down.
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billynomates
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| posted on 28/10/08 at 03:53 PM |
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If the synchronised motor is needing changing regularly, chances are the heating system is in need of cleaning. The motor attracts the iron particles
in the water to the valve, which means the valve won't operate efficiently, hence the motor doesn't last long.
I would think you should get more than 2 years out of the motor.
Also, check your cylinder thermostat is working correctly. Could also be the cause of your problem.
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