At my wits end!! Valliant Eco Tech Pro 28- No Heating....

[troikafloyd]

Hi, Hopefully someone can help me!

As stated I have an eco tech pro 28 ( fitted 2007) supplying 8 rads.
I have a wireless Drayton Digistat RF2 thermostat controling the system.

Problem..... The thermostat appears to be working i.e when I press the button for heating I get a red flashing light on the reciever unit but no heating. There is hot water just no heating.
If I press the + and - buttons together on the boiler then it will fire up and stay on for a short time.......I understand this is a test procedure?
I have re-charged the expansion vessell recently to 1.5 bar.
I have also recently put Fernox 4 Superconcentrate Leak sealer into the system.......just in case there was a leak.

On the thermostat I have a flame symbol showing but the boiler doesn't fire up.
For a long time now there has been a small drip from the condensate pipe outside and every now and then I use the filling loop to re-fill.

Is it possible the Thermostat or Reciever are faulty or as a signal is definately being sent etc it must be the boiler?

Can anybody help please with suggestions!!

 

[gazdaz36]

Does the green light come on on the receiver? If not try pressing the top button to see if it comes on

 

[troikafloyd]

Hi Gazdaz36,
Yes, the green light comes on....

 

[hanns21]

Sounds like the stat is faulty. Test for 240v at the lr connection at the board. Or link out the stat by putting a wire between lr and ls. If your heating works youf stat is faulty. Also you have overcharged the vessel.

 

[St0rmer66]

Faulty wireless receiver. Don't trust the green light! Very common problem.

 

[troikafloyd]

Thanks for your help!

Would it be an idea to get a new stat and reciever etc and if so what would you suggest for a Valliant Ecotech Pro 28......I would like something that i can manually set, i.e not have preset times but just control myself by upping / lowering the temp.

 

[Bunnyman]

U will need to change the receiver and the stat as a pair . Throw them away and get a danfos tp5000, easy to fit, easy to use, very reliable. The fault is common with the Drayton stat u have

 

[troikafloyd]

Thanks for that, I'll look into getting one.

I will post the outcome on here as soon as I have fitted it.

Just like to say this is such a good helpful site and again Thanks to all for your suggestions etc!