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Plumberpro, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience:  Heating and hot water heating appliances experienced
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I've got a Vaillant Eco Tech Pro 28 Boiler. The Siemens

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I've got a Vaillant Eco Tech Pro 28 Boiler. The Siemens hand held thermostat control battery died. I've changed the batteries and now that appears to be working. However, the small box on the wall, which takes interactions from the thermostat controller doesn't seem to respond. There are two lights. A yellowish green one which is on and a red one above it which is flashing?
Many thanks in anticipation.

Hi , does the receiver have a model number of any buttons on it?

It sounds like the battery unit has lost connection with the received unit and needs reconnecting.
Customer: replied 2 years ago.
Hi Toby. There is a serial number on the wall unit.

OK , thanks . just trying to find the reconnecting intructions.

OK . on the back of the handheld controller can you see test and learn buttons

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Hi , on back of controller can you see test and learn buttons?
Customer: replied 2 years ago.
Yes, I can see those.
OK . on the other box ( the reciever) is a set button . press and release this set button ,then on the controller press the learn button . the led should go from flashing green to solid green
This is a link to set up instructions if you want them
Customer: replied 2 years ago.
Yes, solid green. Shall I try programming a temperature setting?
Yes , should be working now
Customer: replied 2 years ago.
A huge thank you Toby. Fast and efficient service. I've not been on a site like this before, but great work.
Your welcome