Any Saunier Duval Experts around??

[zanwan]

Hi All

Was hoping any saunier duval specialists could help me.

I have a Saunier Duval Themaclassic F30E Fanned Flue Combination Boiler G.C. no 47-920-36!

I've been getting no hot water for the past 2 months or so. Central heating works absolutely fine.

Now after advice from you guys, i checked the diverter valve. it was very stiff so i removed the valve, and the valve had black deposits on it. I cleaned it up using cleaning solution. Vavle looked very nice and clean, most of the black was gone, pin was moving pretty freely, but i used some WD40 also just to help.

Put the DV back together, tried the boiler. Central heating is fine. However still no hot water.

What i have noticed now though is that the water is not AS cold as it was. its not warm, just not as cold. And for a second or two, i get a bit of hot water, then warm, then back to "not as cold" as it was before.

If the problem if the DV, would the fact i cleaned it up to almost new looking not have made any different to the performance??

Diagram of parts and part number is found here http://www.saunier-duval.co.uk/spar...doc=Exploded views&var_doc=300402050028H29,21

 

[ChrisR]

But have you been through the fault-finding in the Mfrs Instrrs?

FLow switch responds to water flow, motorised head operates (central pin moves) and operates the reversing valve.

Does any of that happen?

 

[zanwan]

But have you been through the fault-finding in the Mfrs Instrrs?

FLow switch responds to water flow, motorised head operates (central pin moves) and operates the reversing valve.

Does any of that happen?

No, not been through the fault finding if i'm totally honest!

Not sure where to find the flow switch. I done as was instructed by you guys in the previous thread on this, i.e to check the diverter valve switch is not jammed. It did appear to be sticking so i cleaned it up, greased it etc, moves freely but still no hot water.

 

[Agile]

Dreadful boilers anything called an S-D.

The motor actuator should be checked to see if its moving.

Also feel the pin to see if it depresses about 7-8 mm and if it returns promptly.

If the diverter valve was very dirty its also likely the plate heat exchanger is completely blocked!

How can you live for two months without hot water during such cold weather?

About 100m south of the Gas Club on Foleshill Road is a new indian restaurant on a corner which was opened about 6 months ago. I really wonder if it will survive because they have a strict no alcohol policy and will not let you bring your own. So I have not eaten there!

Tony

 

[zanwan]

Agile

How do i check to see if the motor actuator is moving?

I did depress the pin (which left a dent in my finger as i had to apply a lot of pressure), the pin appeared to go all the way in, the come back out quickly.

I cleaned out the heat exchanger about 6 months ago using descaling solution (as i was only getting warm water from the taps). Could that have blokced up again that soon? The hot water was working fine until 1 day it just suddenly stopped, it wasnt a gradual thing.

I've checked through the manual. They instruct to check the cold water inlet filter, take it apart and clean in.

Also the Flow Sensor could be faulty. Can this be cleaned or must this be replaced?

When i turn on the hot water taps, the boiler does fire up fine, and flame burns away happily. I decided to then drain the boiler to se eif the water was hot, and as thought, the water was very hot when i drained it. Therefore the water appears to be heating up, but is not getting into the hot water flow pipe.

lol as for that restuarant, is it the one about 50 yards from Sugar n Spice? across the road? Its got a black sign with red flourecent writing, called Desi Grill?? If so, i've heard the food there is terrible!

A decent place to try is Eastern Diner next to HSBC on Foleshill Road. They have a nice variety of curries and the food they make is very authentic, its proper indian food! Try the Birayni's, they are amazing!

You can also try Cafe Khan, further down foleshill, just near Courtholds. The food there is apparently ok but never been myself.

 

[Agile]

If you unclip the motor and select alternately the DHW and CH then the pin should move. You need tp push gently on the motor pin otherwise you will not see it retract.

You can test the boiler on DHW by leaving the motor off and manually pushing the diverter valve pin using a tool or rod.

It was the Desi Grill I was referring to. If the food is bad as well then it will not survive.

The Eastern Diner is not bad but the best in North Cov is on Holbrooks Road to the west of the Foleshill Road. Its the Bengal Delight. They have some of the best Indian food in the UK. Its not cheap but the presentation would please Gordon R. You can search for my reviews !

The Millenium Balti in Nuneaton is also very good. There is ( or perhaps was ) a place well up the Far Gosford Street which was a bit expensive with small portions although it was very tasty.

Tony

 

[zanwan]

Hi

I've found that when the central heating is on, i do get lukewarm water. However when central heating is off, i get either very little, or no hot water.

Could it be the hot water heat exchanger?

 

[Agile]

Look around the diverter valve.

I was hoping you were going to be able to tell me the Desi Grill had closed!

Tony

 

[ollski]

Looks like a glowworm cxi, try turning off the water preheat and see if it still fires up, i would imagine the flow turbine is shot.

 

[ollski]

Looks like a glowworm cxi, try turning off the water preheat and see if it still fires up, i would imagine the flow turbine is shot.

 

[zanwan]

Agile and co

I finally managed to get round to doing this (on a roasting hot day as i'm sure central heating wont be missed if i get it disastrously wrong lol)

Anyway I removed the motor head as you suggested, and put the gas connection back together.

When i turn on the heating, the pin in the motor head does move, it moves "outwards". When i turn the hot water on, the pin moves back in.

Now on the "three way valve actuator", if i push the pin in, it does go in, but feels stiff. I took it apart, applied wd40, and it seems to have loosened it up, however when i put it all back together, i'm having the same problem. I get central heating but no hot water.

So i removed the motor head again.

Now i have left it like this (i have not put it back together at the moment) and i get no central heating(which i assume is normal as the motor head is not where it should be). However i am now getting hot water whenever i want it.

So what could be the problem here? Is it the 3 way valve actuator? Even though it does move, be it a bit on the stiff side? Or could it be something else?

If it is the actuator valve, where can i purchase this in coventry?

On a lighter note, i'm off to Sugar n Spice tonight, in Longford, just a few yards up from the dreaded Desi Grill! Looking forward to a tandoori roast leg, Lamb balti and pilau rice, washed down with ice cold cola!

 

[Agile]

Is the dreadful Desi grill still open?

I would have expected their attitude ( and you say bad food ) would have ensured its closure by now.

I cannot say I have noticed Sugar and Spice. It must be getting pretty close to the Gas Club!

Based on what you said I dont know whats wrong with your boiler yet but I will think about it.

In the meantime power the actuator for Ch and then take the wires off. Then you can manually place it on the diverter valve when you want CH.

Tony

 

[zanwan]

not sure if its still open. The last time i drove past there is was closed, but they dont seem to open every day which is a bit odd. A mate of mine went in there, ordered a steak and then waited a lifetime for it to arrive. Whilst he waited, he heard a lot of hammering coming from the kitchen (must have been hitting the meat to tenderise it). They then brought out the most enormous steak he'd ever seen. However he said it tasted dreadful! lol

Sugar n spice is near a pub/social club, just over the little hill near, opposite to where the buses go into the Ricoh Arena park. You have to try their food, its excellent!

In regards to the boiler, i'm guessing its something to do with the 3 way actuator, as when i take the motor head off it, i get hot water on demand, whereas previously, i got no hot water. The only limited hot water i got was for a few seconds if the central heating was already on.

regards

Naz

 

[PEDANTICVINDICTIVEMAN]

Bet your starting to smell a bit by now

 

[zanwan]

Any ideas lads what the issue could be?

The weather has taken a turn for the worst and i'd like to have both the central heating and water working.

I'm assuming its the 3 way actuator, but would like a bit of confirmation from the boiler experts on here!

many thanks

Naz