Electric underfloor heating not working — Newport callout and diagnosis
What electric underfloor heating not working involves at a Newport address, what it depends on, and how we price it. Newport coverage for electric underfloor heating not working includes Risca at the same rates.
Do this before we arrive
- Check the board for a tripped device on the heating circuit before assuming the mat has failed. Nothing here is optional.
- Frequently — note when it last worked and whether any flooring, plumbing or joinery work happened around then.
- Confirm the thermostat is actually calling for heat — set point well above room temperature, and check any holiday or timer mode. We will confirm it in writing.
This applies at any NP10–NP20 address: underfloor heating circuits require RCD protection, and a mat that fails insulation resistance testing must not be energised again until it has been repaired or isolated permanently.
People often put off electric underfloor heating not working because they expect the worst. Usually the scope is narrower than feared.
In practice most failures are the thermostat or the floor sensor, not the mat. The most useful thing you can tell us on the first call is what changed immediately before you noticed the problem. The alternative — ignoring a thermostat at end — tends to cost more later.
There is no single right answer for electric underfloor heating not working — the correct one depends on the age of the installation and how it has been altered since. It is the kind of detail that separates a tidy job from a callback.
If the property is tenanted, the visit is arranged around access rather than around us, which usually means confirming times with whoever holds the keys. If it turns out not to apply here, you will be told that plainly.
A written record matters as much as the work. Anything we find at a NP10–NP20 address is documented in a form you can hand to someone else. We measure the mat's resistance is the part worth confirming rather than assuming.
There is no benefit to us in recommending work that testing does not support, and plenty of downside. Written scopes mean you can compare us with anyone else on like-for-like terms.
Scope, access and timing below assume a NP10–NP20 address.
The usual suspects
- A tripped RCD or RCBO on the heating circuit — one of several possibilities, all of which get checked.
- Physical damage to the mat, typically from a fixing. Older Newport stock shows it earlier than newer builds do.
- A failed floor sensor reading open or short circuit, which explains why the problem comes and goes rather than staying put.
- A thermostat at end of life, or one whose — more likely where earlier work was never certificated.
Scope of the visit
- We we measure the mat's resistance and insulation resistance against before deciding what, if anything, needs replacing.
- Every visit includes this: that sequence tells us in minutes whether you are.
- Once access is agreed we we measure the mat's resistance and insulation resistance against.
What it costs: mat, sensor and thermostat testing quoted as a single diagnostic visit; parts and repair priced after readings.
Why this comes up in Newport
Newport's mix of Maindee/Pill terraces with rewireable boards and modern Glan Llyn new-builds means quotes vary sharply by postcode — a survey almost always changes the number.
Travel to Newport is already built into how the week is planned, so it does not appear on your invoice as a surcharge.
We also cover Cwmbran and Caerleon on the same rounds as Newport.
Questions we get asked
Why does the thermostat show heat but the floor stays cold?
That pattern normally means the sensor is reading incorrectly, so the thermostat believes the floor is already at temperature.
Is older wiring automatically a problem?
No. Plenty of older Newport installations test well. Age is a reason to check, not a verdict.
How do I know the price will not change?
Because it is set after testing, not before. Extra work is only ever agreed with you first.
How far in advance should I book?
For non-urgent work, a week or so gives the most choice of slots across NP10–NP20.
Do you charge more for Newport callouts?
No. Newport and the surrounding Cwmbran and Caerleon area are inside our standard coverage, so the same callout applies as anywhere else we work.
Book this in for your Newport property
Booking is by phone or form; either way you speak to the person who would carry out the work. Access details for the Newport property are the only thing we need to get started.