How to mend ... Cycling Off Hot

Spectrum Fuel-Miser Mk IV?

My central heating system has a Spectrum Fuel Miser Mk IV which provides: . Electronic temperature control of... [Read more]

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 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]

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]

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]

Intermittant Boiler opeartion?

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

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]

Ravenheat 85 cycling on/off?

My ravenheat 85 a works fine when asking for HW however when the CH is demanded the burner will ignite, burn ... [Read more]

No Central Heating from a Ferroli F30B?

I have a Ferroli F30B. Have just received a letter from their Customer Services saying they can't send an eng... [Read more]

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]

Ferroli 102 DHW intermittent?

My 102 is about 7yrs old. Long been a problem with DHW cycling between hot and cold a nuisance in the shower. ... [Read more]

potterton netaheat 16-22 not lighting probs?

I have just replaced all the rad valves in a mates house, drained the system, replaced all the velves and retr... [Read more]

Potterton Profile cycles every 4-5 minutes?

My Potterton Profile 50e when started from cold works normally for about 15 minutes. Then it starts cycling 3 ... [Read more]

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]

worcester 35cdi hot water cycling on/off?

this happens 4/5 times during 5 minute shower(trevi therm mk2) also happens when using only hot water tap in k... [Read more]

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]

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]

Potterton Performa 24 combi boiler on off cycling problem?

My Potterton Performa 24 combi boiler ignites correctly but only stays on for a minute initially then switches... [Read more]

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]

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]