Sorry BMU Err, on Vaillant VRT360F Wireless room stat.
Vaillant 937 installed 2 weeks ago with above remote stat.
Anyone know what this means?, doesn't seem to be interrupting DHW or Heating operation though.
Vaillant 937 installed 2 weeks ago with above remote stat.
Anyone know what this means?, doesn't seem to be interrupting DHW or Heating operation though.