Gulvvarme ikke virker?

Hej, foreigner living in Denmark here - my Danish isn't good enough for technical stuff yet so I apologize for posting in English! We have water underfloor heating in the bathroom, which worked perfectly for the past two years but this year it isn't heating up seemingly at all. Other radiators work (bit weak, though.) We're on central heating.

https://preview.redd.it/bt6w9rupnr7e1.jpg?width=1816&format=pjpg&auto=webp&s=6e960f0834aceacba8d1e071e2a96ec5865e8a54

The bathroom underfloor heating has this valve in the bathroom itself. I used the smaller valve in the background there to see if I need to let air out - barely any air was stuck and it consistently let out warm water.

https://preview.redd.it/i0e3ym91or7e1.jpg?width=1816&format=pjpg&auto=webp&s=d00b7d93bc21fc02edd974499026addb2feb1a79

Next to the valves are these two red guys. All this is below the bathroom sink unit. I have not touched these yet. To be honest I do not have any experience with these heating setups and am not sure what pipes or dials or valves are doing - I have attempted to photograph anything in the room with the other waterworks that might be relevant

https://preview.redd.it/mnb5whedor7e1.jpg?width=1816&format=pjpg&auto=webp&s=72353fc182519103210e732cbd871b2d3c00484c

https://preview.redd.it/xko8biedor7e1.jpg?width=1816&format=pjpg&auto=webp&s=2d86de2d5edc1c998346cc24659e2c9b0fbfd301

https://preview.redd.it/f9nb5iedor7e1.jpg?width=1816&format=pjpg&auto=webp&s=4944661bb94104e74857d9e489a03ad60e9350d3

https://preview.redd.it/fox8miedor7e1.jpg?width=1816&format=pjpg&auto=webp&s=a74414e8bb359591fa03694ee1e89e1cd0fd0380

Any very obvious, silly mistakes that I'm missing and can solve myself? Would rather lav-det-selv! tak!