Potential underfloor heating problems and how to solve them

Like any heating system, there may be times when the underfloor heating (UFH) doesn’t seem to be working as it should. Nu-Heat’s Technical Team helps you to find the root of the problem, whether electrical or down to a failed part, to get the system up and running again.

Let’s take a look at a few of the potential problems you may come across with UFH and how to go about solving them.

UFH system

Underfloor heating single zone not heating up

If a single zone is not heating up as expected, it could be caused by a number of small problems that are all fairly simple to resolve:

  • A sticky pin valve underneath an actuator
    There is a small pin underneath each actuator. You need to remove the actuator from the affected zone to check that the pin valve is free. If it’s stuck down it can be freed using a silicone spray. You can also use a pair of long nose pliers to try and free the pin.
  • Actuator failed
    If an actuator has failed, this is most likely due to an electrical issue that could relate to a thermostat or wiring board. It’s best to consult a qualified electrician to check the circuits.
    A faulty actuator can also cause the UFH to be permanently switched on.
  • Faulty thermostat
    You can easily reset a thermostat by following the user guide. If the system uses wireless, battery-powered thermostats then it’s also a good idea to check the batteries. If neither of these options works, it could potentially be an electrical fault so a qualified electrician should be called.
    A faulty thermostat can also cause the UFH to be permanently switched on.

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Meet the team – Finance

The Finance Team play an important role in Nu-Heat, ensuring all of our suppliers and employees are paid accurately and on time. They also make sure that any customer refunds are processed promptly as well as providing the company with timely and appropriate management information and analysis.

In this post we speak with the team of five to find out what they like about working at Nu-Heat.

Nu-Heat finance team
Nu-Heat’s Finance Team, from left to right: Sarah, Amy, Laura, Alex, Clair
How long have you been at Nu-Heat and what did you do before?

Laura: I’ve been at Nu-Heat for almost 3 years. Previously I was a financial analyst at Devon and Cornwall Housing.

Alex: 8 years now. I joined Nu-Heat as a Sale Ledger Co-ordinator before moving to my current role in Credit Control.

Clair: 3 years, having spent the majority of my working life beforehand at the Yorkshire Building Society.

Sarah: I started working at Nu-Heat over 13 years ago, having just relocated to Devon from Worcestershire. Initially I started in the Admin team as a receptionist before moving to deliveries. I joined the Finance team in early 2004.

Amy: I’m new to the team and have been here for just over 3 months.

What do you like about being part of Nu-Heat and the Finance Team?

Sarah: The Finance team are a very close team and we are very supportive of each other which has been a great help over the years. Nu-Heat is a great place to work, everyone is friendly and helpful and the management team have always been very supportive and flexible.

Alex: The staff are friendly and the Finance team are great!

Clair: I like working for Nu-Heat as I feel it is a very relaxed atmosphere to work in and the family values are still present within the company.

Amy: Great company to work for, everyone in the team helps each other out and there is a great atmosphere.

Laura: Nu-Heat is an evolving medium size business which constantly adapts to meet customers’ needs. My role in the finance team is varied and challenging.

A 5 step checklist to assess your project for renewables

Ground source heat pumps

Nearly any property, new build or retrofit, can benefit from renewable technologies.

Whilst the majority of properties can enjoy some type of renewable solution, there are a handful of important considerations to ensure that the system installed is efficient and worth the initial investment.

We’ve put together a simple 5-step checklist to help you assess your project for renewables:

  1. How old is the property and how well is it insulated?Insulation is extremely important when installing a heat pump as they operate at their most efficient when producing lower flow temperatures. The more insulation you have, the less heat that is lost. If your property is a new build (built in the last 10 years), the insulation should be up to current Building Regulations, meaning it ought to be suitable for a heat pump.

    If you are renovating it is essential that the insulation levels are being brought up to Part L1B standards in order for the heat pump to be efficient. In this scenario, you will need to consider the costs of insulating your property versus the benefit of installing a heat pump.

  2. Does the property have access to mains gas?Heat pumps are ideally suited to properties without access to main gas as you’re likely to see a greater return on investment when compared to electric and the fluctuating prices cost of oil and LPG fossil fuels.A heat pump is still be a viable eco-friendly solution for a new build property that is on the gas grid, as the high levels of insulation mean that the heat pump will operate very efficiently.
  3. Does the site have plenty of free land?When it comes to choosing a heat pump, the site plays a big part in the type of unit required.A GSHP requires free, accessible land that is approximately 3 times the total floor area of the property to accommodate the ground loops. There is also the option of digging boreholes, although this is considerably more expensive.

    If space is not available, an ASHP is a good, cost-effective alternative.

  4. Will the property require planning permission?It’s important to check if your property requires planning permission before installing an ASHP.There is varying criteria for different Planning Authorities, so it is best to obtain clarification on planning permission. The main consideration is around the heat pump’s proximity to neighbouring properties and also the noise levels emitted.

    The majority of installations will fall under permitted development and one of the checks for this is that the heat pump is sited more than 1 metre from the edge of the property’s boundary (3 metres in Wales).

    Solar is also covered by permitted development rights, however you must check with planning if you are in an AONB, a Conservation Area or if the building is listed.

    As a GSHP unit is situated inside the property, planning is not required.

  5. Electricity supplyMost heat pump installations should only require a standard single-phase electricity supply.For larger properties, usually over 330m2, where a heat pump over 12kW will be specified, it is likely that a three-phase supply will be required. You would need to contact your electricity supplier for more information.


Qualifying for the RHI

One of the big appeals of a renewables system is that the installation cost can be offset by applying for the Government’s Renewable Heat Incentive. In order to qualify for the scheme the system must meet strict design and installation criteria, something that Nu-Heat can help you and your installer with.

Find out more about whether a heat pump is right for your project by watching ‘Everything you need to know about heat pumps‘.

You can also visit use our Heat Pump Selector Tool or call 01404 5440650 to speak with an expert.