Two Radiators on when Hot Water on but Heating off

frizzy1

We have a baxi boiler and both Hot Water and CH controlled by Lifestyle LP522. If HW on and CH off, two radiators upstairs (next to the airing cupboard) come on. If we then put the CH on (with HW on) the remaining radiators come on.

If we turn off the HW and then put on the CH, all radiators come on.

Is this a problem with the programmer?

Why do only two radiators come on when the HW comes on but the CH is off??

Thanks

RedOnRed

We had a similarish problem which was due to a faulty valve in the CH system.

If it's the same thing it should be quite cheap to fix. Take it you haven't got CH breakdown cover?

frizzy1

Thanks.

So how do you locate the faulty valve?

No CH breakdown cover - the house is only 3 years old so wasn't really expecting any problems.

Unbelievable_2

We had similar problem. Apparently there is a three way valve (HW only, CH only or HW + CH) which can stick. It cost us about £35 to get a plumber to replace it. Not too bad!

plumb1_2

We had similar problem. Apparently there is a three way valve (HW only, CH only or HW + CH) which can stick. It cost us about £35 to get a plumber to replace it. Not too bad!

do plumbers in you area come from Bedlam ;D,as it would cost over £35 for the valve alone.Also depends if you system is a S plan or Y plan

pmcx9

is it a combi boiler or conventional?

plumb1_2

is it a combi boiler or conventional?

What is conventional?

pmcx9

taken from http://www.selfbuildabc.co.uk/building/heating.htm

Central Heating Boilers
There are three types of boiler commonly used: conventional, combination and condensing. Conventional boilers are a good choice for families who needing plenty of hot water and typically return 75-88 per cent efficiency. Combination boilers heat water direct from the mains, eliminating the need for cylinder and tank to store the water - efficiency may reach 90 per cent. Condensing boilers use an extra heat exchanger to reuse more of the heat that is wasted by a conventional boiler. Condensing boilers typically return an energy efficiency output of between 90-95 per cent. This does come with a price premium with prices starting from around £800.

or for a real bore then read here http://www.diyfaq.org.uk/plumbing/plumbingpage1.html#conventional

DING_DONG_4

WE HAVE BOUGHT A HOUSE WITH OLD HEATING SYSTEM IN IT (20YRS). WE PUT OUR WATER ON, AND WATER AND RADIATORS COME ON. IF WE PUT HEATING ON, NOTHING COMES ON. FORTUNATELY WE HAVE A SHOWER, SO DON'T HAVE TO USE THE HOT WATER TOO MUCH. JUST FOR WASHING AND WASHING UP!!
CALLED OUT BRITISH GAS(WON'T GIVE US COVER BECAUSE OF THE AGE OF THE SYSTEM) AND AN INDIPENDANT PLUMBER BOTH SAID IT WOULD COST ABOUT £500 FOR THE NEW VALVE!!! BUT THE INDIPENDANT PLUMBER SAID THAT WE WOULD PROBABLY BE BETTER OFF JUST WAITING FOR IT TO BREAK COMPLETELY AS IT MAY LAST A FEW YEARS. THAT WAS NEARLY 3 YEARS AGO AND ALTHOUGH IT CAN BE A BIT OF A PAIN IN SUMMER ITS STILL GOING AS YET!!!
WILL DEFINATLY GET COVER WHEN GETTING NEW HEATING SYSTEM!!! :-/ :-/

amboy

i cant understand why people get cover when they have a new system installed at least for the warranty period anyway, choose carefully and you get 2 year warranty, pay for it on barclaycard and they extend it for another year.

IMHO that beats giving BG £15 a month for nothing, save the money and i bet you are better off, if anything goes wrong get your local friendly plumber to sort it.

In response to the original post, I had similar problem with rads on top level of house, it was put down to no diverter valve on old systems, one way round it was to put thermostat valves on the radiators in question.

plumb1_2

taken from http://www.selfbuildabc.co.uk/building/heating.htm

Central Heating Boilers
There are three types of boiler commonly used: conventional, combination and condensing. Conventional boilers are a good choice for families who needing plenty of hot water and typically return 75-88 per cent efficiency. Combination boilers heat water direct from the mains, eliminating the need for cylinder and tank to store the water - efficiency may reach 90 per cent. Condensing boilers use an extra heat exchanger to reuse more of the heat that is wasted by a conventional boiler. Condensing boilers typically return an energy efficiency output of between 90-95 per cent. This does come with a price premium with prices starting from around £800.

or for a real bore then read here    http://www.diyfaq.org.uk/plumbing/plumbingpage1.html#conventional

And is this conventinal boiler,balance flued,fan flued,conventional flued,Gravity circulation,pumped S plan,pumped Y plan?