Vokera Linea 24, Water only luke warm

I have a Linea 24, the Temp tells me it's giving out water at 63 degrees, but is just luke warm. Can anyone help please.

I have had to change and clean the Heat Exchanger many times before, as in a hard water area, although not done for a year now. I think the water board have now added water softener?

The symptoms have been different from before. Then as there is a shortage of water in the heat exchanger the thermostat registers that the water is too hot and switched off, making the hot water go cold until it cools down.

On this occasion the temp stays at 63 and the water luke warm. Can someone tell me without to much guessing weather it would be another part:- Pump, thermostat. Or should I clean the exchanger again.

There was a bit of noise when running the hot tap for a few weeks. I put down to the pressure, as I had a leak following the last time I cleaned the h/e. water would leak from the valve at the back above the H/E.

please someone give me some good advice....

Run your hot water then check other pipes underneath for
warming,22mm ones

I cleaned the heat Exchanger today, but nothing has changed, there may of been a change in pressure and I thought the the flames would cut out for a couple of seconds, but I may not have been running the tap with enough flow. still water only warm.

I felt underneath when running the hot water, nothing was heating up, just luke warm, like the water coming from the tap, yet temperature showing 63. once turned off, it drops down to 44 degrees.

Now will look on line for diagram, so will be able to identify thermostat and where the D/Valve is..

Still unsure what the problem will be.

Still needing more help please. Thanks

You need to measure the resistance of the temperature sensors when the boiler has been off for a couple of hours to cool down.

You seem to be getting a wrong indication of the hot water temperature.

There must also be an underlying fault causing the low water temperature, possibly a gas related fault if the rads are not heating up during prolonged hot water usage.

Tony

If this is a Linea 24 of about 10 years old, then its similar to my Linea 28 which started to do just this after nine years faultless service. Its probably the diverter mechanism sticking on the end of the motorised valve. You can buy a service kit, but in all honesty I could have just cleaned up all the components..I just wanted to have spares just in case. You will need a little box spanner (I can't remember what size) to get at the diverter pin mechanism..its a bit of a pain, and also the pin fits into a ball joint that is none too robust, but takes some reseating on reassembly to get it back into its socket. The diaphragms rarely fail I am told, but I fitted the new one anyway.

I'm not explaining this very well as the boiler is 130 miles away, I've just sold the house and in a weeks time the Vokera will be somebody else's

I took off the DHW plate to plate and that was clean as a whlstle. Anyway after I overhauled the diverter it was back to stonking good Hot Water again.

In spite of what some people say about Vokeras (and I'm going to one tomorrow) my Linea 28 has been excellent over ten years.

Alfredo

Now sixth day without hot water. It's a good job it's not winter...

My plumber is on a big job this week and may not be able to get round until next week.

I've had the heat exchanger out again and cleaned it up. I do think that the local water board have put a softener in the water, as the is no way as much limescale as I've had to remove before.

I also removed and cleaned the main heater thing above the flames and played with the d/valve, but only took the first half of the manifold off. not worked out how to get right in.

All this and now even worse. My plumber advised me to check the rads, or the pipes leading to them, if these were getting hot when the hot ap is running. Then it's the d/valve. but this was not happening, so I don't know where the hot water that is being heated up is going.

The temp was reading 63 and the flames would die a little. Now five days on the temp reads 12 degrees, however when you turn on the tap it jumps up to 72/73 degrees, yet the flames don't ignite.

Now I'm far from being an expert at this, but could this be the temp sensor. If this is telling lies stating that the water is this hot, then the flames won't have the need to fire up.

Can someone confirm this and is there a simple test I could carry out to check this. Also, I've down loaded and diagram of the boiler, but where would I find the sensor?

Any help is very much appreciated.
Graham

There are two sensors, one top right fitted on the main heat exchanger, to access that you have to gain access to the combustion chamber, and remove the right side panel. Bit tricky if you have limited space, the DHW sensor sits right side of boiler return section, they're both wet sensors so you would need to drain the boiler. For the cost i would replace both

Many Thanks Mylocalgasman,

I've seen the the one on the top right when I removed the main heating chamber to clean it. and I'll look for the other. Ill get the part numbers and order them on-line somewhere. Espares may do them?

Again Thanks
Graham

Lazypod said:

I've seen the the one on the top right when I removed the main heating chamber to clean it.

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