Electric Underfloor Heating Not Heating Fully

[RidwaanDIY98]

I recently had an electric underfloor heating (UFH) system installed in my flat. The installer initially shortened the cable from the UFH system, but later realized it was too short. He attempted to extend it by using cable connectors. Afterward, the sensor stopped working and displayed an Er1 error message. I ordered a replacement sensor, but it was too short, so he again extended it by cutting the wires and connecting them with cable connectors. The problem I'm facing is that the system warms up, but the heat feels more lukewarm than hot. It's not heating properly. The floor does feel slightly warm, but not enough to be noticeable. I’m unsure why it’s not heating effectively. I’ve attached pictures of the work that has been done. I’m really stressed about this and would appreciate any help or advice. Thank you in advance!

 

[cross thread]

Underfloor is only warm , as it’s a large area

 

[JohnD]

Look at the meter, run the heating for an hour, look at the meter again.

How many kWh did it use?

How warm is the house?

 

[RidwaanDIY98]

The house is cold - it’s winter here in London. I set it to 60oC but it only goes up to 33oC.

 

[flameport]

. I set it to 60oC but it only goes up to 33oC.

No underfloor heating will heat to 60C or anything near it - doing that would damage the floor and be a serious hazard to anyone walking on it.
Maximums are generally around 30C.

 

[ericmark]

Seem to remember 27ºC as the limit, you do need to be able to walk on the floors with bare feet. Quick google

The maximum temperature for underfloor heating is typically 29°C for stone, ceramic, terracotta, porcelain, and slate, and 27°C for carpet, wood, vinyl, and other floor coverings.

I know some thermocouples have a special cable, and I had to buy special plugs and sockets, K type thermocouples seem popular I know my meter will work with a number of types, and I can't remember which need special connectors. Think yours is a NTC 10K, but I have not done research, I will leave that up to you.

As @JohnD has said, to measure the power used seems a good idea. There are two very different types of underfloor heating, resistive and chemical, the resistive is controlled with a mark/space ratio of switching on/off, but the chemical changes its resistance as it heats up. I would assume you have the former cheap resistive type?

 

[Murdochcat]

The house is cold - it’s winter here in London. I set it to 60oC but it only goes up to 33oC.

Does it actually get to 33 degrees C ?

That sounds very expensive

 

[JohnD]

The house is cold - it’s winter here in London. I set it to 60oC but it only goes up to 33oC.

That doesn't help. Those numbers cannot be the house temperature.

 

[ericmark]

60ºF = 15.5ºC
33ºF = 0.5ºC
Maybe got F and C mixed up? But

I would not want my house at 35ºC so think this is a wind up.