Hi,
I have a problem with my shower, whereby when I initially turn it on, the water comes out hot, but then within a matter of minutes, it goes cold.
I found that if I turn off the shower, turn on the bath taps until the water runs hot, then turn them off and the shower back on, the shower runs hot again - but within a minute or two, it goes cold again!
The system was installed approximately 20 months ago and I have not had any problems until now.
It's a mains pressure shower with a thermostatic valve above the bath, which also has taps and a shower mixer.
The system runs off a Worcester Bosch Greenstar 24i Junior Combi boiler and has an inline Scalemaster Magnetic Speedfit scale inhibitor fitted.
I checked the pressure on the boiler and it was very low, so I've topped it up to the specified level, however, the shower is still having the problem.
My brother has the same boiler, which was installed around the same time, and when Worcester Bosch came out to look at it under the guarantee, they said the heat exchanger had scaled up and needed replacing.
When I spoke to the engineer who installed both systems, he found that very surprising after such a short space of time.
We both live in the south of England, in a very hard water area, but I've never heard of anyone having this problem so quickly with a combi boiler either.
Any ideas?
It seems like a design flaw if the heat exchanger has to be replaced/descaled that frequently.
Could it be that the cartridge in the thermostatic shower valve might need replacing, since the hot water to all other taps and even the bath tap mixer seems fine.
The water flow from the shower is quite poor, so maybe there's scaling somewhere?
Flow from all taps is strong, but not the shower.
Thanks for any suggestions/advice!
I have a problem with my shower, whereby when I initially turn it on, the water comes out hot, but then within a matter of minutes, it goes cold.
I found that if I turn off the shower, turn on the bath taps until the water runs hot, then turn them off and the shower back on, the shower runs hot again - but within a minute or two, it goes cold again!
The system was installed approximately 20 months ago and I have not had any problems until now.
It's a mains pressure shower with a thermostatic valve above the bath, which also has taps and a shower mixer.
The system runs off a Worcester Bosch Greenstar 24i Junior Combi boiler and has an inline Scalemaster Magnetic Speedfit scale inhibitor fitted.
I checked the pressure on the boiler and it was very low, so I've topped it up to the specified level, however, the shower is still having the problem.
My brother has the same boiler, which was installed around the same time, and when Worcester Bosch came out to look at it under the guarantee, they said the heat exchanger had scaled up and needed replacing.
When I spoke to the engineer who installed both systems, he found that very surprising after such a short space of time.
We both live in the south of England, in a very hard water area, but I've never heard of anyone having this problem so quickly with a combi boiler either.
Any ideas?
It seems like a design flaw if the heat exchanger has to be replaced/descaled that frequently.
Could it be that the cartridge in the thermostatic shower valve might need replacing, since the hot water to all other taps and even the bath tap mixer seems fine.
The water flow from the shower is quite poor, so maybe there's scaling somewhere?
Flow from all taps is strong, but not the shower.
Thanks for any suggestions/advice!
