F59 – it is the DHW that failed due to timing out on heating water to the target temperature. To reset this error code, simply go to the DHW Panel turn it off for 10 seconds to clear the code, and turn it back on then. If there is no heating at the house because it prioritizes the DHW first, and when it gets this error, it can cause the SH to fail, or maybe the switch on the boiler failed to switch over from one to the other (just a guess).
For yearly maintenance, you can use https://www.breffnirenewables.com/
We have a static fee of 200 EU for a maintenance call.
For warranty calls reach out to Dimplex Ireland https://www.glendimplexireland.com/en-ie/contact-us
Citywest Village 
Hi
Has anyone come across the problem on the heating control display where the illumination has increased so much that the icons are no longer visible when you look at it square on?
If I look down on the pannel at a 10 degree angle from the side i can almost make the out the icons. Has anyone experienced this and/or know of a quick fix?
Thanking you in advance for your help.
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