Combi boiler fault

scouseeric · 21st July 2012, 19:36

Evening folks, as title,
another problem with this piece of ..... a protherm 80E combi. In the last few months its had a new pump, new gas actuator pcb and air pressure valve, kerching...! Now i'm told the diverter module is u/s, wont change to dhw on demand, heating works fine. i can get the hot water working by manually pressing the micro switch but the plunger from the diverter isn't moving. i looked at the diaphragm, no splits or holes, and the plunger isn't jammed.
If this fault entails another limb amputation then no, i'd rather renew with a decent make eg W/Bosch that have good reports.
Thanks gents

Eric

Steve916 · 21st July 2012, 19:43

I think this may be a case for MarkD3

rich17865 · 21st July 2012, 22:11

I would replace the diaphragm with a new one, it is almost certainly the fault even if yours looks good there maybe a pinhole in it that you missed. They are usually less than a tenner and a 15 minute job.

On the other hand, repairing old boilers with new major parts is almost certainly a money pit, once one thing goes wrong, the rest of the parts are almost at the end of their life too.

rich17865 · 21st July 2012, 22:12

If you do go down the new boiler route, the simple rule is, cheap boiler expensive parts, expensive boiler, cheap parts.

scouseeric · 21st July 2012, 22:59

Yep renew i think is the way to go. Looking at a Worcester bosch model 28i that suits, but looking at a previous thread on combi faults that Mark added to, he seemed dubious with W/B? and he's the expert. Any others i should consider folks?

Eric

Nunfa1 · 22nd July 2012, 07:40

I couldn't recommend a manufacturer but I would certainly recommend insurance, especially on a combi boiler. We were advised to insure our after it was fitted and am glad we did, it's gone wrong several times. Only last week it was serviced as part of the insurance cover and it broke straight away, took them five days to fix it.
Ours is a vaillant and I wouldn't recommend it.

scouseeric · 22nd July 2012, 07:48

Hi Phil, thanks for the advise. Yes i will look into one of those monthly schemes that cover breakdowns and regular servicing

Eric

Billy1mate · 22nd July 2012, 07:56

I have a Vailiant ecotec 831 and had no problems it did cost a bit but buy cheap buy twice. Whichever you go for make sure the heat exchanger is made from stainless steel & not aluminium, the aluminium ones corrode over time and ruin the boiler.

mark d3 · 22nd July 2012, 18:46

Quote:

Originally Posted by scouseeric

Yep renew i think is the way to go. Looking at a Worcester bosch model 28i that suits, but looking at a previous thread on combi faults that Mark added to, he seemed dubious with W/B? and he's the expert. Any others i should consider folks?

Eric

hi Eric avoid wb not overly impressed with them,baxi potterton make a half decent boiler the duotec mk1 or potterton gold but a good deal at the moment is the potterton titanium available here http://www.mrcentralheating.co.uk/th...cPath=213_209& with a 5 year warranty
dont get the duotec 2 or netatec there not as good
now back to your current boiler it could still be the diaphragm at fault or a seized diverter

scouseeric · 22nd July 2012, 19:25

Thanks Mark, that looks to be an excellent deal!

within my budget and your advice most welcome.

Eric

PS s/steel heater that Billy mentioned as well!

21st July 2012, 19:36	#1
scouseeric Passed Away 75 contemporary se cdti Join Date: Dec 2010 Location: Liverpool Posts: 1,579 Thanks: 0 Thanked 0 Times in 0 Posts	Combi boiler fault Evening folks, as title, another problem with this piece of ..... a protherm 80E combi. In the last few months its had a new pump, new gas actuator pcb and air pressure valve, kerching...! Now i'm told the diverter module is u/s, wont change to dhw on demand, heating works fine. i can get the hot water working by manually pressing the micro switch but the plunger from the diverter isn't moving. i looked at the diaphragm, no splits or holes, and the plunger isn't jammed. If this fault entails another limb amputation then no, i'd rather renew with a decent make eg W/Bosch that have good reports. Thanks gents Eric

21st July 2012, 19:43	#2
Steve916 This is my second home Rover 75 1.8 Connoisseur SE and a Ford S-Max Titanium Join Date: Jan 2012 Location: Huntingdon Posts: 3,756 Thanks: 70 Thanked 31 Times in 27 Posts	I think this may be a case for MarkD3 __________________ Mods so far: Plenums, bonnet release mod, handbrake compensator (arctic), rear parking sensors, coolant level sensor (Vindaloo), DRL's, Fan resistor upgrade ( Jules), Marmite lighting, Auto dimming rear view mirror, twin horns, fog lights, real walnut dash, walnut gear knob, Sean DD unit with DVB-T, message centre ipk, electric sun blind, auto opening boot lid, walnut steering wheel, electric seats Link to my Auto Boot Lift Mod http://www.the75andztclub.co.uk/foru...d.php?t=114273

21st July 2012, 22:11	#3
rich17865 This is my second home Transit Connect Join Date: Feb 2011 Location: Crewe Posts: 9,532 Thanks: 868 Thanked 1,619 Times in 1,095 Posts	I would replace the diaphragm with a new one, it is almost certainly the fault even if yours looks good there maybe a pinhole in it that you missed. They are usually less than a tenner and a 15 minute job. On the other hand, repairing old boilers with new major parts is almost certainly a money pit, once one thing goes wrong, the rest of the parts are almost at the end of their life too.

21st July 2012, 22:12	#4
rich17865 This is my second home Transit Connect Join Date: Feb 2011 Location: Crewe Posts: 9,532 Thanks: 868 Thanked 1,619 Times in 1,095 Posts	If you do go down the new boiler route, the simple rule is, cheap boiler expensive parts, expensive boiler, cheap parts.

21st July 2012, 22:59	#5
scouseeric Passed Away 75 contemporary se cdti Join Date: Dec 2010 Location: Liverpool Posts: 1,579 Thanks: 0 Thanked 0 Times in 0 Posts	Yep renew i think is the way to go. Looking at a Worcester bosch model 28i that suits, but looking at a previous thread on combi faults that Mark added to, he seemed dubious with W/B? and he's the expert. Any others i should consider folks? Eric

22nd July 2012, 07:40	#6
Nunfa1 Avid contributor Rover 75 Tourer 2.5V6 Auto Con SE Join Date: Jun 2012 Location: Southend Posts: 169 Thanks: 0 Thanked 0 Times in 0 Posts	I couldn't recommend a manufacturer but I would certainly recommend insurance, especially on a combi boiler. We were advised to insure our after it was fitted and am glad we did, it's gone wrong several times. Only last week it was serviced as part of the insurance cover and it broke straight away, took them five days to fix it. Ours is a vaillant and I wouldn't recommend it.

22nd July 2012, 07:48	#7
scouseeric Passed Away 75 contemporary se cdti Join Date: Dec 2010 Location: Liverpool Posts: 1,579 Thanks: 0 Thanked 0 Times in 0 Posts	Hi Phil, thanks for the advise. Yes i will look into one of those monthly schemes that cover breakdowns and regular servicing Eric

22nd July 2012, 07:56	#8
Billy1mate Posted a thing or two 120d M Sport Join Date: Feb 2012 Location: Sunny Weymouth Posts: 1,815 Thanks: 153 Thanked 142 Times in 121 Posts	I have a Vailiant ecotec 831 and had no problems it did cost a bit but buy cheap buy twice. Whichever you go for make sure the heat exchanger is made from stainless steel & not aluminium, the aluminium ones corrode over time and ruin the boiler.

22nd July 2012, 19:25	#10
scouseeric Passed Away 75 contemporary se cdti Join Date: Dec 2010 Location: Liverpool Posts: 1,579 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks Mark, that looks to be an excellent deal! within my budget and your advice most welcome. Eric PS s/steel heater that Billy mentioned as well!