Recent: Will I need to replace my garden tap?

Mend > Home Heating Systems

Mend Ferroli 102 Boiler Central Heating Temperature

Ferroli modena 102 not firing up properly?

My boiler has been temperamental for some time, so my water goes from hot to cold & back, now the central heating has started doing the same. The fan appears to be ok. Have notices that when there is more air able to circulate, it comes on & will stay on. The flue is clear. Could this be something to do with the air pressure switch? how do you know if it is working correctly?

zoe
November 2009
You can test aps with a multi-meter. Set to ohms put black lead on cmn terminal and red lead on 'nc' (three pin switch) should get a steady reading. No reading then switch is dead.
If two pin switch put red lead on 'no' pin. You should get no reading, if you do switch is dead.
If you find switch is ok test air flow to switch with a digital manometer - should be at least 2 mbars. If it isn't then the venturi inside the flue elbow will be blocked.
Remove elbow and clear blockage.

Nige
December 2009
Hi,

Had the same problem myself and found the answer posted on another site. It will involve a small amount of DIY but will save you pounds if it works!

1. Turn off gas supply (red tap underneath boiler) and elctrical supply (fused switch, to side or above/ below boiler) Undo screws on main cover and remove.
2. Undo 4 screws on metal cover facing you (has burner window hole on it).
3. Look to the top of the boiler and you will see the fan and a copper coil.
4. By the copper coil is two electrical connections. Behind and to the side of these connections is a further single connection which should have green/yellow wiring.
5. Carefully pull of the connector and blow inside to remove any dust, wipe the connector pin free of dust/dirt and replace.
6. Try the same for the two connectors by the front near the copper coil.
7. Replace all screws/covers in reverse order.

This worked for me and saved me calling an expensive engineer.

Good luck

Adrian S
December 2009
check the venturi inside the fan for blockage or debris, check the plastic pipes (1 clear and 1 red ) arent blocked or kinked, does the fan keep starting and stopping ?.

silverfox
November 2009

Related Questions ...

Mend central heating hot water megaflow
1

Can't get hot water working, heating okay?

I've just moved house and have an Intergas Combi Compact Eco RF gas boiler with a separate Megaflow tank with ... [Read more]
Mend boiler heating thermostat
1

combi oil Worcester greenstar heatslave 12/18 switches off?

I have a internal combi oil Worcester greenstar heatslave 12/18 Its has a built programmer and Hot water t... [Read more]
Mend boiler hot water central temperature luke warm
1

Worcester boiler 35CDi?

What can be wrong with my boiler? I first noticed a problem when my shower began running hot then cold, hot th... [Read more]
Mend combi boiler central heating fault
1

240 combi boiler reduce hot water temperature?

The temperature of the hot water is reduced from normal although the central heating radiators are fine has an... [Read more]
Mend central heating hot water temperature
4

Isar HE 35 heats central instead of warm water?

Hi there. There is a tricky thing in my boiler. I was observing that my heaters are hot and the temperature is... [Read more]
Mend central heating radiators temperature
1

potterton performa 30 HE?

Hi water working fine but when central heating is turned on upstairs radiators work ok but downstairs nothing.... [Read more]
Mend vaillant boiler fires
2

How can I fix my Vaillant Ecotec Plus 428 boiler problem?

When the outside temperature is very cold, and the boiler fires up to heat domestic water and/or the central h... [Read more]
Mend combi boiler central heating hot water
1

Ariston ecombi 30 problem?

My combi boiler works fine but hot water goes cool every 3-4 minutes for about 10 secs and then goes back to t... [Read more]
Mend boiler central heating temperature sensor
2

Potterton Suprima 80L?

The boiler works with no logout. The lights operate as per the manufacturers manual. After 60 seconds the boil... [Read more]
Mend central heating system
1

Spectrum Fuel-Miser Mk IV?

My central heating system has a Spectrum Fuel Miser Mk IV which provides: . Electronic temperature control of... [Read more]
Mend combi boiler central heating flow switch
3

Central Heating works but no hot water? Worcester 28i RSF?

Hi I hope someone can help. I have a Worcester 28i RSF Combi boiler that i have a problem with. A few we... [Read more]
Mend Saunier Duval Boiler Central Heating
2

How can I fix my Saunier Duval Semia Condens boiler?

The Central Heating (CH) side works perfectly but the Domestic Hot Water (DHW) has developed a problem, thus..... [Read more]
Mend remote boiler temperature
1

Siemens RDJ10RF shows incorrect temperature?

Hi there, can anybody shed any light on this problem- we have siemens rdj10rf wireless remote to operate centr... [Read more]
Mend boiler combi boiler central heating
1

Baxi 105e Combi - Hot then cold water cycle?

Hi, I have a BAXI 105e Combi boiler in the house I have just brought, it was installed in 2006. I have noticed... [Read more]
Mend boiler central heating hot water
1

Vokera Linea 24 No Hot Water on Central Heating Mode?

I am having problems with my Vokera Linea 24, I've had a few engineers to it but they haven't been able to sol... [Read more]

How to mend ...

Find out how to mend just about anything howtomendit.com for free repair help, information and advice.
Mend Home Heating Systems ...