How to mend Hot Water Cycling Boiler

Sime Super 90 MkII fails to ignite 'sometimes'?

My boiler 'sometimes' fails to ignite. I have my boiler on timer early morning / late evening and notice somet... [Read more]

Drayton Digistat SCR not firing boiler?

Help, My drayton digistat scr is not firing up the Worcester/bosch 24i junior boiler. The scr is communicati... [Read more]

Ravenheat combi boiler continually firing then shutting down?

My 3 year old Ravenheat CSI 85A combi boiler developed the following fault: Firstly, the domestic hot water w... [Read more]

4

How can I optimize settings on Glow Worm Ultra com 30cxi? ?

Boiler was installed 3 winters ago. First winter very poor, rads took hours to heat and boiler was off when th... [Read more]

Vokera Linea Max - hot cycling after re pressurising expansion vessel?

I have re pressurised the expansion vessel to 12psi having isolated and drained the boiler. The vessel now hol... [Read more]

1

Vokera linea ag plus. Domestic hot water cycling hot and cold?

I have the same problem with taps or showers. Checked again and its not just the showers, hot tap turned on an... [Read more]

potterton 24 performa cycling?

i have followed the answers having a similar problem, the hot water works fine having replaced (some time ago)... [Read more]

2

Up grading Potterton Profile?

Currently we have a Potterton Profile 55e that works well and is very reliable. Due to changes in the layou... [Read more]

POTTERTON PRIMA F ERRATIC FAILURE TO IGNITE?

When the hot water or heating is switched on the boiler attempts to start up, i.e. the fan starts and stays on... [Read more]

cYCLING PROBLEM?

The boiler is an Ariston A27/MFFI Eurocombi. The boiler is fine on the hot water side but when the heating is ... [Read more]

3

Prima F40 - No hot water or heating?

Hi, My Prima F40 boiler is doing nothing when hot water and/or heating is turned on. The heating pump kicks... [Read more]

Intrmitent hot water whilst running the shower or taps?

I have worcester 28i RSF combi boiler, Approx 7 years old, The hot water cycles hot and cold at about 30 sec... [Read more]

4

Intermittant Boiler opeartion?

Good morning, Friends of mine have a Vailant Turbo Max 828E, they say heating apparently works fine however... [Read more]

3

Potterton Prima 50 F main burner will not remain on?

I've got a twelve or thirteen year old Prima F which has run reliably until the last year or so. I fixed the u... [Read more]

1

baxi 105HE combi is short cycling?

my Baxi 105HE combi boiler works ok for hot water but in heating it runs for 5 seconds and off for 15 seconds ... [Read more]

2

Valliant Turbomax 282E Hot Water Cycling on & off?

When I draw hot water, the boiler comes on normally and heats up the water for about 15 to 20 seconds then cut... [Read more]

1

unburnt gas in flue gases, glow-worm 100e electronic combi?

Boiler fires ok on DHW and CH, plenty of hot water and no unburnt gas in flue gases on DHW, but in CH mode boi... [Read more]

1

Baxi 105e c/heating cycling?

The boiler seems to be heating in bursts. The main burner is only lighting for a few seconds and then shuts o... [Read more]

2

Ferroli Falcon cycling on and off with heating and hot water?

Hi, My boiler has been cycling on and off for a while now on both the heating and hot water. I have changed th... [Read more]

1

DHW problem Vaillant Turbomax Plus 828E?

If I open the cold water supply valve to the boiler fully, when drawing hot water the temp. rises to approx 83... [Read more]