Mend > Home Heating Systems

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How to repair F4 code?

how to repair F4 code on Saunier Duval F12/1 boiler

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Tybox 827 rf shut-down?

I have a Tybox 827 rf which is not responding to my heating settings after I allowed the 'service due' reminde... [Read more]

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My potterton boiler keeps losing water pressure and condens?

my potterton boiler keeps losing water pressure ans condensate trap keeps filling up real quick

British gas 532/i?

our boiler the hot water keeps cutting out, it is showing the error U9 on the dial what does this mean ? Bri... [Read more]

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Halstead ace combi boiler?

Hi my halstead ace boiler isn’t heating water but my heating is working ok what can I do to fix

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How do I rectify aU9 Code?

Worcester Bosch Greenstar 37CDi Combi showing code U9? My boiler is showing code U9, I know this means that th... [Read more]

Siemens RDH 10 RF Thermostat not triggering heating?

I have Siemens RDH 10 RF Thermostat and a Worcester Bosch Greenstar 30CDi combi boiler. The battery in the th... [Read more]

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F1 fault?

My Marco Feb -24E is showing fault F1 what does that mean?

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How can I mend my Heat Surge Unit Model #X5A?

My Heat Surge unit Model X5A comes on for heat and then turns off the heat, while the blower and other compon... [Read more]

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Fagor?

fagor combi boiler runs for two days sometimes two weeks then cuts out with a red light wich flashes every fo... [Read more]

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Pressure gauge on a Potterton Boiler?

On a Potterton Powermasx HE what should the pressure gauge next to the refill loop read?

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Baxi solo 3 PFL 30?

Hi.I need a help.My boiler Baxi solo 3 pfl 30 not working. Boiler On- On Fan On- On Pilot On- On Burner On... [Read more]

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Fuse blew within hrs Halstead ACE HE 30 after being replaced?

Halstead ACE HE 30 boiler. The fuse went on the PCB and was replaced but only lasted a few hrs. I have anoth... [Read more]

Halstead 40H boiler pilot keeps going out?

With the Halstead 40H boiler (1985) the pilot light was always problematic for staying lit if the wind blew di... [Read more]

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Worcester greenstar 25si compact?

how to raise the pressure worcester greenstar25si boiler

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Boss therm bps242rf timer not coming on?

Hello I have the boss therm bps242rf and have my timer on but last few days the heating is not coming on the s... [Read more]

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Drayton Digistat +RF Model RF-601?

Drayton central heating control system. Occasionally sticks on heating when it should have shut down. Only way... [Read more]

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Vailliant turbo max plus 824e?

vailliant turbomax plus 824e combi boiler, intermittent fault on domestic hot water supply, fails to come on w... [Read more]

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British Gas 532i?

I have a British Gas 532i boiler, when I got up this morning we had no hot water and I checked the boiler and ... [Read more]

Dimplex Duo 400i clicking temperature control display?

Dimplex Duo 400i clicking temperature control display