How to mend ... B Dhw Out

worcester bosch 537i gas combi?

open dhw tap - boiler fires and goes to full fire fan on pump on no hot water

Re Pressurizing Riva Compact?

Model M90E.24S My heater keeps locking out. Tonight the pressure bar has gone below 1 to around 0.5 and th... [Read more]

no hot water?

i have a baxi 24 combi boiler the heating is working correctly and the dhw taps for bath and upstairs basin wo... [Read more]

Ariston ACO 32 MFFI - Losing Pressure?

Hi all, I have got the above boiler (out of warranty) which when pressurised (Via Filling Loop) is losing full... [Read more]

Sime Halstead Trio Combi Boiler - No DHW flow at all?

There is no water flow at all from Hot water Taps. Plenty of pressure on cold water supply. Central Heating is... [Read more]

Why does my Heatslave DHW run cold on low flow?

My Heatslave 20/25 has always had a tendency to stop delivering hot water when a tap is running slow. It is fi... [Read more]

Ace High Flow switch/Diverter valve?

Hi all,problem is mine is leaking from dhw plunger area,slide to hold micro switch box is rusty,little bit of ... [Read more]

how can I fir my poterton puma 80 ?

It heats the DHW ok but when I start the CH it cuts out after 20 Seconds and shuts down even the pilot light g... [Read more]

DHW is fine but CH only runs for 10/15 sec?

Hi, i have a Chauffataux et Maury Combi 80. The CH will only run for 15 sec then go off, after a while it will... [Read more]

DHW on ravenheat CSI 85 A(T)?

my dhw comes on but as soon as water comes warm it goes off and keeps on repeating this operation.have you eve... [Read more]

My boiler Vaillant ECOmax 824E needs to be reseting every morning.How can I?

ECOmax 824E needs to be reseting every morning.After reseting boiler operates in heating mode and DHW as norma... [Read more]

Ravenheat Little Star LS100 problem?

I have had a few problems with this boiler for the last year in that the DHW is only hot when it feels like it... [Read more]

GlowWorm 24ci boiler high pressure fault?

With the boiler left on, i.e. no demand for DHW or CH, the pressure will remain constant, set at 1.0 bar. Whe... [Read more]

Worcester 280 RSF Overheating, please help!?

My 280 rsf overheat thermostat trips when DHW demand is switched off after it has been on for a long time, ie ... [Read more]

problem with Vailant eco Tec 831?

have DHW, pressure fine 1.4 but have no CH, boiler fires up on demand and turns off, have no fault code only f... [Read more]

i am tyring to fitt a dhw thermitor on an ideal isar he24?

where does the domestic hot water thermistor connect to,do anyone knows? thanks

How do i drain the DHW on a Worcester Greenstar 24i Junior?

I need to drain teh DHW on a Worcester Greenstar 24i as I have a leak on the flow unit? Thanks in advance

No Hot Water?

I have a Vaillant Turbo maxVUW242E and the DHW operation has failed. I have changed the micro switch and diaph... [Read more]

Baxi Luna 310 Fi , fluctuating DHW temps?

I have a Baxi Luna 310 Fi, which is a combo boiler/DHW heater. I have had troubles since installed 5 years ago... [Read more]

How do I replace the diverter valve on a Ferroli HE31C?

How do I replace the diverter valve on a Ferroli HE31C ?? After several days of trying to find out why I ge... [Read more]