Ferroli Modena 80e problem.

[Fabby19]

Hi, I have a ferroli modena 80e which has started to play up. It was not igniting with the hot water or central heating so called in a plumber. He serviced the bolier and couldnt find anything wrong with it. It springs into action when the front casing is off or hanging down which is strange so he recommended a new pcb. When he tested the fan, the venturi crumbled(which seems quite common) which we also replaced. So now we have a new pcb and venturi and still have the same problem. The boiler either works for a while then shows the lock down light or the green led light comes on but has not ignited. Plumber now avoiding us and cant get anyone else out. Can anyone help. Fan seems ok, air pressure switch too.

 

[villa_tom]

If the boiler works when the casing is off then you have a pressure problem. Possible APS probelm although you could have a blockage in the fan/venturi's

 

[Billy Bob Bob]

classic knackerd aps if the venturies have been replaced,sadly you did not need a pcb

 

[Fabby19]

Hi, thanks to both of you for your quick answers, why are you so confident its the aps and not the thermistors like people have had recommended in their questions? Is this a common fault with ferroli boilers do you know?

 

[villa_tom]

Its a common fault really. Where I used to work we used to kepp Ferroli APS on our vans as we looked after a few of them and it was a very common fault. Shame you had to waste money on a PCB.

 

[Billy Bob Bob]

because it works with the combustion door off not a thermistor issue

 

[rm1]

before you buy anything else for the boiler check for resistance at the fan terminals you should be looking for about 70 kohms if you are only getting say under 50 the fan is faulty also check if there is a restrictor fitted just above where the fan sits if your flue length is under 1 metre it should be a 45mm flue restrictor if the flue length is greater then you can remove the restrictor

 

[Billy Bob Bob]

before you buy anything else for the boiler check for resistance at the fan terminals you should be looking for about 70 kohms if you are only getting say under 50 the fan is faulty also check if there is a restrictor fitted just above where the fan sits if your flue length is under 1 metre it should be a 45mm flue restrictor if the flue length is greater then you can remove the restrictor

its not the fan or restrictor,or at least highly unlikely IMHO the op has had venturies replaced(the biggest cause of this fault) it is very likely the aps is the culprit

 

[Fabby19]

Really hoping it is the APS because my husband says he might have difficulty testing the fan!

 

[quality]

Really hoping it is the APS because my husband says he might have difficulty testing the fan!

He is registered isn't he your husband ?

 

[Fabby19]

Your right, might finally get a plumber if they only have to fit a new APs.

 

[Reltub]

It will most likely be the aps, but still could be the fan so would definitely do the check rm1 suggested to eliminate it. Unfortunatley sounds like the guy you had change the pcb didnt know what he was doing so wouldnt call him back anyway, also only gas registered engineers should be working on the appliance.

 

[Fabby19]

Hi, had the fan checked its fine, changed the air pressure switch and still the problem persists. Have noticed a pattern to boiler shutting down, it ignites when the hot water is running just by itself and central heating is not on. The problem happens when the central heating is on and then the hot water is switched on. Either it doesnt ignite immediately or the hot water does ignite then when i switch off hot water it goes into standby and then when the central heating should come back on it shuts down the boiler(red light)

 

[quality]

There is two models of the 80 e with the same GC No. one has a separate ignition board and one has just one board but the rest of the boiler is the same

which do you have ?

 

[Billy Bob Bob]

Hi, had the fan checked its fine, changed the air pressure switch and still the problem persists. Have noticed a pattern to boiler shutting down, it ignites when the hot water is running just by itself and central heating is not on. The problem happens when the central heating is on and then the hot water is switched on. Either it doesnt ignite immediately or the hot water does ignite then when i switch off hot water it goes into standby and then when the central heating should come back on it shuts down the boiler(red light)

and are you 100% the venturies have been done?

 

[Dannypipe]

before you buy anything else for the boiler check for resistance at the fan terminals you should be looking for about 70 kohms if you are only getting say under 50 the fan is faulty also check if there is a restrictor fitted just above where the fan sits if your flue length is under 1 metre it should be a 45mm flue restrictor if the flue length is greater then you can remove the restrictor

How do you know the resistance rating for the fan? Is that a general rating or specific for this boiler? Genuinely want to know.

Thanks.

Oh and when I had this problem on a 102, it was the venturi. However the manufacturers tech line insisted it was a blocked heat exchanger....I listened to Gas Man and he sorted it. So do ensure the venturi got done.

 

[rm1]

the resistance is what the modena 80e with an mf03 board should be

the modena 102 fan has a resistance of 24-27 kohms

 

[Fabby19]

Hi, we have two boards mfo2 and an ignition board. The venturi in the fan has defo been changed because I went to get it and seen the plumber change it. Gas man, you say venturies, is there two?

 

[Billy Bob Bob]

yes there is and if he has only changed one theres your problem there should be a red one and white one

 

[Fabby19]

The one i went to get was a brown one so assuming it was the white one he hasnt changed, can you tell me what that is called please, and if its easy to get. I really appreciate your help and wish you worked in Scotland!

 

[Billy Bob Bob]

there you go part numbers 39809790

 

[Fabby19]

Hi, had a quick look and seen a kit with a white one and the brown one, is it possible to buy the white only?

 

[Dannypipe]

the resistance is what the modena 80e with an mf03 board should be

the modena 102 fan has a resistance of 24-27 kohms

I struggled to get any figures from Feroli...do you mind telling me how you come by this info? Many thanks.

 

[Billy Bob Bob]

Hi, had a quick look and seen a kit with a white one and the brown one, is it possible to buy the white only?

no they come in a pair not dear though about a tenner

 

[Billy Bob Bob]

Hi, had a quick look and seen a kit with a white one and the brown one, is it possible to buy the white only?

can you show me the link most modenas are red and white

 

[Fabby19]

FERROLI FAN ASSY VENTURI KIT 39809790 BRAND NEW on eBay (end time 05-Mar-11 12:46:27 GMT)
Hope that link works gas man.

 

[Billy Bob Bob]

thats the earlier type which yours may have have you your gc number try here [DLMURL="http://www.gas-spares.co.uk/Catalogue/FERROLI/BOILERS-Combi/MODENA-Range"]MODENA Range - Gas Appliance Spares (Preston) Ltd[/DLMURL]

 

[rm1]

dannypipe the information is available from the tech helpline at ferroli if you get someone who knows what he is talking about and not just reading it from a book i personally take resistances from component parts this has an advantage as you can then test a component part of a boiler without needing power

now regarding the venturis the white one is common to the modena however the red venturi and brown venturis are different one is for the 80e and the other is for the 102e hope this helps

 

[Billy Bob Bob]

have commonly found the red and white fitted to both 80e and 102e suppose it depends on model year

 

[Fabby19]

Hi, its GC No 4726705-2. Assuming its -2 because the new pcb I bought is Mf02. Is the venturies responsible for shutting down the boiler when running hot water and the central heating is on because that seems to be the problem?

 

[quality]

Yes most probably

 

[Billy Bob Bob]

Hi, its GC No 4726705-2. Assuming its -2 because the new pcb I bought is Mf02. Is the venturies responsible for shutting down the boiler when running hot water and the central heating is on because that seems to be the problem?

yes, especially as you have found it works with the combustion door off,the venturies or aps are always suspect under these circumstances

 

[Fabby19]

Great thanks will buy the venturies and let you know, thanks for all your help.

 

[Plumb-Crazy]

Hi, This is my first post here. If I understand the problem that Fabby19 has, the fault is causing a lockout (red light). My experience is that the Modena 80E does not lockout when there is a fault with the airflow (either the APS or the venturi). If the airflow from the fan is not detected then there is no ignition - but there is no lockout.

It is worth checking if the lockout (red light) occurs BEFORE the point in the ignition when the fan starts, so that the fan does not even attempt to start up. I have just worked on a Modena 80E with this fault. The cause, in this particular case, was dry solder joints on the second PCB (ignition) but I believe the same symptoms can result from dry solder on the main (MF02) PCB. If you replaced the MF02 board then your problem could be the ignition board. If you are competent, you could try examining the solder with a magnifying glass for characteristic fine circular cracks. In particular, there are two relays on the ignition board. Check the solder on the pins of those relays.

 

[Fabby19]

Hi. thought I would update this post. Boiler was still working on and off so got out another engineer who confirmed it was a faulty pcb(ignition) which we have now replaced and fingers crossed its now working a treat.