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Post by rocketmanbkk on Feb 3, 2017 17:36:06 GMT
Hello
My mums neighbour phoned me. I've known her since I was a kid.
She's got a potterton combi
Kit sink & bathroom basin are hot
She says the baths only luke warm
I immediately thought the boiler supply per litre isn't good enough for the bigger bore pipe.
My mate said maybe it's the tap, he said something about a thermostatic tap & maybe that's the issue.
Any ideas please? I'm going to look tomorrow morning.
Cheers all
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Post by rocketmanbkk on Feb 3, 2017 18:26:00 GMT
Anyone on this one
Pleeaaseeeeeee.....
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Post by lauraleeks on Feb 3, 2017 18:32:58 GMT
It sounds like its a thermostatic mixer problem If the basin tap is running hot.
To adjust temp;
Take screw out of control knob and remove, turn hot water on and adjust the thermostat control till required temp achieved.
PS For diagrams google triton or bristan thermostatic bath mixer.
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Post by rocketmanbkk on Feb 3, 2017 18:37:23 GMT
Where will the control knob be but first of all how can I identify if it is indeed a thermostatic mixer?
Thx
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Post by battle1066 on Feb 3, 2017 19:20:35 GMT
Most likely as Lauraleeks suggested since a combie but I have known of properties which have got a pre set safety valve under the bath since its possibly elderly persons accommodation and its bypassing.
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Post by tomplum on Feb 3, 2017 19:22:15 GMT
it must be a posh house if the bath is a thermasttic mixer, but yes there are such things, if its not a thermastat mixer i'd say the secondry heat exchanger on the boiler is furring up, its ok on the sink/basin because it not running for as long, filling the bath means its running longer and high pointing the fault on the boiler, Course I can't tell from here, you need to be near the boiler and feel the water going through the secondary Hex,
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Post by rocketmanbkk on Feb 3, 2017 19:23:40 GMT
I'll have a look
If it's not a thermostat issue then I'm at a loss. I'll see if the pipe before the tap is red hot or Luke warm. I'll report back.
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Post by rocketmanbkk on Feb 3, 2017 19:25:49 GMT
it must be a posh house if the bath is a thermasttic mixer, but yes there are such things, if its not a thermastat mixer i'd say the secondry heat exchanger on the boiler is furring up, its ok on the sink/basin because it not running for as long, filling the bath means its running longer and high pointing the fault on the boiler, Course I can't tell from here, you need to be near the boiler and feel the water going through the secondary Hex, Ok thx It's an ex council house so definitely not posh Without seeing it I'm thinking boiler I thought as soon as she told me that the water isn't being heated fast enough for the demand. |
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Post by rocketmanbkk on Feb 3, 2017 19:25:58 GMT
Thx all
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Post by battle1066 on Feb 3, 2017 19:30:21 GMT
I always find its best to make my own judgements once I've checked everything at the job Rocket, cause as Toms pointed out that's possible but so this, if the setting on the combie is for low water temp and the baths full bore you'll only get Luke warm water.
i've even had the plastic adjusting knob shaft snapped in the PCB and adjusting the temperature was pointless as the action wasn't being transferred to the PCB.
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Post by rocketmanbkk on Feb 3, 2017 19:35:05 GMT
Agreed Battle
Just trying to get different ideas before I go
I'll report back, see what I find
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Post by rocketmanbkk on Feb 4, 2017 10:38:27 GMT
Just an update
Went to look at this, they're the old council pillar taps of the 60's
The bath is red hot until the flow is fully opened then Luke warm
I think the boiler won't give the demand.
Cheers all
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Post by crowsfoot on Feb 4, 2017 14:08:23 GMT
It could well be that rocky (old 3/4 bath taps fed with large capacity carrying 3/4 pipes are not really made for modern combi's).
Is this a new problem or as it always been like it?
PS If you switch the CH off and run the hot tap for a while then feel the CH flow pipe from the combi, if it's warming up whilst the hot tap is running it's a sign the diverter valve is playing up.
PPS I went to a job this week were the hot water was fluctuating between hot then cold then hot then cold and going hot again (wasn't sure what was causing this though so I passed it back on to the gaffer).
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Post by rocketmanbkk on Feb 4, 2017 15:17:22 GMT
If the bath hot is on low flow it's red hot like the others, turn it up & it gets warm only.
Always been a problem
Cheers
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Post by rocketmanbkk on Feb 4, 2017 15:18:14 GMT
It could well be that rocky (old 3/4 bath taps fed with large capacity carrying 3/4 pipes are not really made for modern combi's). Is this a new problem or as it always been like it? PS If you switch the CH off and run the hot tap for a while then feel the CH flow pipe from the combi, if it's warming up whilst the hot tap is running it's a sign the diverter valve is playing up. PPS I went to a job this week were the hot water was fluctuating between hot then cold then hot then cold and going hot again (wasn't sure what was causing this though so I passed it back on to the gaffer). That could be the plate heat exchanger- it happened on my combi a few years ago That's all I know! |
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