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We have 79 questions about mending 'hot water will not work unless ch'

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Mend Heating, Home Heating Systems

Domina 80E CH fault?

I can get hot water easily and constantly but the central heating doesnt work properly. The CH comes on when i... [Read more]
Mend Heating, Home Heating Systems

problem with puma 80 boiler?

The pressure drops regularly,but i cannot see any leaks,Both ch and hot water work ok but after turning hot wa... [Read more]
Mend Heating, Home Heating Systems

vaillant ecomax 824e flashing e20,e13,f20. How to fix it?

Thing is, that my boiler (which is vaillant ecomax824e) use to go through these codes e20 and then f 20, or e1... [Read more]
Mend Heating, Home Heating Systems

no hot water from shower?

i have a mira shower (mains) and i have no hot water the ch system works as do my hot taps when i turn on the ... [Read more]
Mend Heating, Home Heating Systems

Potterton Netaheat 16-22 HW doesn't work without CH?

I have had this problem with our Potterton Netaheat 16-22 Boiler for a while now. It is fine during the winter... [Read more]
Mend Heating, Home Heating Systems

how to check the pump on a worcester 28si boiler?

i want to know if the pumps going on my boiler. the ch is still working and hot water still working but wont w... [Read more]
Mend Heating, Home Heating Systems

Potterton Suprima 60?

Works ok with CH but when hot water kicks in boiler locks out. When reset it works ok again until more hot wat... [Read more]
Mend Heating, Home Heating Systems

Vaillant Turbomax 828 problem?

This is a strage one! I am not sure whether my diverter valve is on the way out or whether something else is c... [Read more]
Mend Heating, Home Heating Systems

plate heat exchanger?

for the second time in 2 years i think my plate heat ex in my vaillant combi is clogged up. the Ch seems to w... [Read more]
Mend Heating, Home Heating Systems

Worcester Bosch Highflow 400 rsf boiler problem?

I have a problem with my Worcester Bosch Highflow 400 rsf boiler. If hot water is on, I cannot get central hea... [Read more]
Mend Heating, Home Heating Systems

DHW on RSF82E?

My hot water will only work when switched to both CH/DHW but is starting off hot then goes cold constantly, ca... [Read more]
Mend Heating, Oil Filled Radiators

no hot water from halstead ace high 47-333-16 HW/CH boiler?

i am unable to get the hot water to work but i do have working central heating. The boiler seems to fire up b... [Read more]
Mend Heating, Home Heating Systems

how can i fix my worcester bosch 24i rsf boiler?

in need of some help with my boiler please, i cant get ch to work unless i turn the hot tap on to let the boil... [Read more]
Mend Heating, Home Heating Systems

why does the DHW work and not the Central Heating Worcester 24i rsf combi ?

the pressure is fine the boiler fires up when you run the hot water but the CH is not working. Have put it on ... [Read more]
Mend Heating, Home Heating Systems

problem worcester 24i rsf?

boiler will not ignite for ch in the morning,ignites for dhw after turning hot water tap on/off then ch will w... [Read more]
Mend Heating, Home Heating Systems

Rayburn Driven Central Heating Problem - Upstairs Cold?

I have a Rayburn Gas CH system with a seperate pump. The cooker / boiler is in the basement kitchen with 3 ra... [Read more]
Mend Household Appliances, Sewing Machines

Heating system not working correctly?

My central heating system is causing me problems. The boiler fires OK, but I can only get hot water. The centr... [Read more]
Mend Heating, Home Heating Systems

2009 - Do I still have to drain the whole system to replace TRV?

Recently had CH system chemically cleaned and flushed through which was very successful. Following this four T... [Read more]
Mend Heating, Home Heating Systems

Hot Water But No CH Poterton Neataheat Profile 30e-80e?

In addition the my previous question (with same title), I managed to get the Central Heating (CH) working for ... [Read more]
Mend Heating, Home Heating Systems

ferroli domicompact f 30 b hot water works fine but ch wont work?

It will run for 15 min when test programme is run but wont work on timer or on overide, was working fine until... [Read more]
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