Vaillant ecotec pro 24 generating hot water but no central heating

Stemcg · 20 Jan 2018

Please help.
Ive had no heating in 3 days. Scoured the Internet to find the answer to no avail. Had the pressure up n down. Tried resetting the boiler, keep getting the radiator icon but it doesn't flash, my boiler also seems to be showing a crazy thing. It seems to say it's 72 centigrade

terryplumb · 20 Jan 2018

Hi ,you would get better response if you posted this in plumbing / central heating forum. Ask moderators to move it. Anyway ,as I see it ....your domestic hot water works fine ,but your radiators are not heating up. Your boiler is showing 72 deg temp. Is it showing that when central heating is supposed to be on ,and hot taps are NOT running ? If so ,this is a circulation problem I.e the heat being generated by burner is staying in the boiler and not getting circulated around the radiators. The first port of call would be the diverter valve not functioning .

Stemcg · 20 Jan 2018

The degree's goes down when I run the hot water. Right now the boiler is at 69 centigrade and the radiator icon has disappeared. New to this so will try to ask this to moved

terryplumb · 20 Jan 2018

That's to be expected when hot tap is running ,as the heat in the boiler is being transferred to the cold water thats running through ,and magically coming out the tap hot

.

Stemcg · 20 Jan 2018

So do u have any ideas of how to get my heating on. The radiator icon flashes for a few minutes sometime then stops

terryplumb · 20 Jan 2018

Can you give a few more details of your set up please.
1. Do you have a wall thermostat ?
2. What do you use to turn central on when you want it. Programmer ,or do you just turn on demand at the boiler.
3. Please confirm that your domestic hot tap water works perfectly well every time you turn a tap on.
Cheers

Stemcg · 20 Jan 2018

Wireless wall thermo set 2 35/highest setting. I just turn it on @ the boiler.yes hot water works fine every time.

terryplumb · 20 Jan 2018

There is no quick fix unfortunately.it involves getting access to inside the boiler and doing some diagnostic testing .not something I would really want to advise you to do without knowing how safe ,and competent you are to be able to take that on. One question , have you or anyone , recently touched the isolation valves on the bottom of the boiler ? Bit of a long shot really !!

Stemcg · 20 Jan 2018

The only thing I have tried was to fill the boiler with loop an then 2 drain it by bleeding on of the radiators

Stemcg · 20 Jan 2018

There is now an egg timer icon that has appeared

terryplumb · 20 Jan 2018

I assume you did this AFTER the problem reared its head with rads not getting hot ? For your info ...system pressure should be 1 bar when system is cold. When system heats up its normal for pressure to increase ,anything up to around 2 bar would be normal ,depends on total water content in system expansion. Approaching 3 bar indicates a problem. Reason I asked about isolation valves is if the flow / return were closed off ,you wouldn't get hot radiators.

terryplumb · 20 Jan 2018

Egg timer icon is just the boiler anti cycling mode activated . and of no great concern currently.

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Vaillant ecotec pro 24 generating hot water but no central heating

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