Potterton Puma 100e no H/W or CH and burning smell?

Joined
28 Mar 2003
Messages
34
Reaction score
0
Country
United Kingdom
Had heating on and noticed rads getting cool. Went to garage and noticed strange burning type smell. Tried HW and not working either. Checked Modulation PCB (as I replaced it a year ago) but looks fine - no sign of burning (as do the other 2 boards).
When a tap is turned on or CH the boiler makes a buzzing noise but never ignites flame. The red LED on PCB lights when calling for water but not CH.
Pressure gauge is normal and no warning lights on.
Any ideas what's happened?
 
Sponsored Links

Rob

Joined
14 Aug 2006
Messages
5,564
Reaction score
712
Location
London
Country
United Kingdom
Where does the buzzing noise come from?
 
Joined
26 Jun 2004
Messages
64,193
Reaction score
4,648
Location
London
Country
United Kingdom
Does the pump run for that matter?

If pump is on but not fan then its probably the ignition PCB on the back. They fail are the ratio of about 30:1 to the main pcb.

Tony

Edit, sorry forgot about that smell. There is a particular special pump- smell! Almostly certainly that. It may be too hot to touch too.
 
Sponsored Links
Joined
1 Sep 2006
Messages
676
Reaction score
3
Country
United Kingdom
Is the pump running as they can smell really good when they go or stick and buzz.

Stan
 
Joined
28 Mar 2003
Messages
34
Reaction score
0
Country
United Kingdom
Thanks for the replies.
I took the cover off to see the fan. The fan doesn't seem to be running even when CH or HW are on. The pump does seem to run (put a screwdriver on it and other end to my ear and can hear a whirring noise).When I undo the black screw thing on front of pump and turn pump over it feels ok.
Presumably the fan should run all the time?
The paper type covering on the winding of the fan motor does seem to be a bit dark brown stained - I wonder if it's burnt out?
The fan does turn with a screwdriver though.
Is it the fan or the PCB that controls it? Or something else.
Thanks again.
 
Joined
15 Dec 2006
Messages
4,491
Reaction score
558
Country
United Kingdom
With demand on the fan should run.

Using a multimeter test for voltage at the fan with demand on....230v?
 
Joined
28 Mar 2003
Messages
34
Reaction score
0
Country
United Kingdom
Thanks.
I'll test tomorrow. So if i find 230v at fan then the fan has gone - if no voltage then it's the PCB? Right?
Any recommendations for Potterton spares suppliers?
 
Joined
28 Mar 2003
Messages
34
Reaction score
0
Country
United Kingdom
Well I have found voltage at the fan so looks like the fan has had it?
Presumably a broken fan would stop boiler working completely?
Thanks.
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Top