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20 November 2022

Vaillant Eco Tec Plus system boiler hot water priority diagrams

This are diagrams for domestic hot hot water priority set up using: – Vaillant system boilers – Vaillant SensoComfort controls with VR 71 wiring ceters – System with hot water cylinder, radiators and UFH  

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04 December 2016

Vokera Sabre 25HE Plus not working

This boiler originally made by Vokera and later sold under Sabre brand is very rare. In fact it is so rare that even Vokera does not list it on their web site. The only mention of this boiler can be found on Sabre boiler web site. This boiler has a facia with 3 led lights, […]

02 December 2015

Biasi Riva Plus HE – boiler cutting out on hot water and heating

Biasi Riva Plus HE M296.24 SM/C boiler not working correctly. Symptoms were as follows (same at heating and hot water): boiler would fire up and then cut out after around 1-3 minutes boiler would only restart after manual reset After quick investigation I found out that it is circulation problem that causes this boiler to […]

30 November 2015

Ariston Clas 30HE – error codes SP1, SP2, SP3, 501, 504

If your Ariston boiler is displaying SP1 , SP2 and SP3 error codes please make sure that your gas is turned on at the gas meter or if you are on prepaid meter that you are in credit. If you have a gas hob test it by turning your hob on. If your gas is […]

20 November 2015

Vaillant Eco Tec Plus 630 fault / error code F.32

Vaillant Error Code F.32 – this fault code indicates a problem with fan, fan wiring, electronics or hall sensor. If you need your boiler repaired please get in touch through contact section on this web site. This time I got called to a Vaillant system boiler Eco Tec 630 Plus showing error code F.32. Boiler would not ignite […]

15 November 2015

Vokera Linea 24 error code E 07

Client complained about hot water problems on Vokera Linea 24. At first sight it seemed like a blocked hot water plate giving following symptoms: hot water fluctuating between hot and cold – classic blocked heat exchanger symptom occasionally boiler would go to lock out and show error code E07 and would need to be reset […]

22 August 2015

Baxi 105e Instant repair – hot water problems

This time we are looking at Baxi 105e Instant combination boiler repair. This particular boiler has a preheat function which stores preheated hot water in a store build into expansion vessel. This boiler has a DHW pressure differential valve and 3 way diverter operated by electric actuator. Client described problem as follows: ‘It seems that […]

14 April 2015

Glow Worm Betacome 30C hot water problems

I got called today to a Glow Worm Betacome 30C with hot water problems. Water would only get lukewarm and fluctuate between lukewarm and cold. This is a typical symptom of a blocked plate to plate heat exchanger. I also noticed a Magna Clean magnetic filter incorrectly fitted to boiler flow. It should have been […]

14 March 2015

Vaillant Eco Tec Plus 624, 637 – fault, error code F.76

Vaillant fault code F.76 is quite a worrying one. It means that main heat exchanger overheat protection had been activated. Vaillant Eco Tec range has a thermal fuse on top of the main heat exchanger that once activated breaks the circuit to prevent boiler from firing. That fuse is can not be reset and is […]

07 March 2015

Ravenheat CSI 120 – hot water problems, hot water fluctuating between cold and hot

This Ravenheat CSI 120 has been suffering with hot water problems. Hot water from the tap was fluctuating between hot and lukewarm. The reason for that was a blocked secondary heat exchanger. I have cleaned this exchanger about 3 months ago and suggested to the client that the system should be flushed to avoid the […]