EPH Combipack 4 Thermostat

EPH Combipack 4 Thermostat

EPH Combipack 4 Thermostat can help you save money on your energy bills.

It’s wireless, connects via bluetooth, has a range of up to 50  metres, and you can program your heating to come on at specific times.

Why do You Need a Programmable Thermostat?

For a novice, a temperature setting might be the only thing needed.  But do you want your central heating to work even when you’re not at home?  Especially for hours on end when you’re at work from 9 am to 5 pm?

What if you could program your thermostat to switch off at 8:30 am and come on at 4:45 pm?  This way it won’t work while you’re away, but switch on just in time so you return to a warm home.

This not only saves you time and effort, but also brings up the efficiency of your central heating system significantly.

If you’ve got a manual thermostat,  you can always turn it off before leaving your home, but a lot of people forget.  I know I have forgotten to turn my heating off multiple times!

Your home needs to be a convenient and comfortable place to be, without costing you in terms of money or effort spent.  And a programmable controller like the EPH Combipack 4 Thermostat can help you do that.

Why is Your old Analog Controller not Good Enough?

change from old analog to EPH combipack 4 thermostat

If you keep your dated heated system along with old controls, you will fall victim to wasted energy and money.  That’s because you have to manually set the temperature each time.  When you can program your heating, it’s simply set it and forget it.

A boiler that is consistently working to keep your house warm when nobody’s there, also means extra wear and tear on the internal components on top of using more fuel.  While that may not matter in the short term, those pennies saved compound to big savings over the long term.

Which Heating Control is Best for You?


Using the EPH Combipack 4 Thermostat as an example, this type of control device lets you set what temperature and what time your combi boiler heats up.  For example, you may want your property to be warmer over the weekend as opposed to throughout the week, saving you money that would otherwise be wasted.


Allows the user to only select when the boiler switches on or off.

Thermostatic Radiator Valves (TRVs)

Lets the user adjust temperature of each radiator individually by using the valve on the radiator itself.

How can a Programmable Thermostat Help Save You Money on Heating?

It’s important to remember how much money you can save on your bills by having more control over the heating.  Many believe the most cost-effective method is to maintain a steady temperature without change.  Contrary to popular belief, this simply isn’t true.

Not only is it extremely wasteful, but you’re also throwing away the main function of your digital thermostat.  Here are just a few ways you could cut down on those bills and save yourself some pennies:

  1. Gradual changes down in temperature by even 1°C – according to the Energy Saving Trust, can save you £80 to £85
  2. Setting your thermostat to 19°C or 20°C.
  3. Keeping the temperature at a necessary low such as 16-19°C during those winter weeks when it really matters.

Ultimately you’ll want your house kept comfortable, so any method that cuts down bills is worth learning.

About EPH

EPH Combipack 4 Thermostat

EPH Heating Controls Ltd are a reliable and experienced company spanning more than two decades.  As a provider of top-of-the-range products, EPH understand the residential and commercial markets extremely well.  With a focus on quality, they source from Germany, Italy, Sweden, Switzerland and the UK.

What is the EPH Combipack 4 Thermostat?

The EPH Combipack 4 Thermostat is the latest in programmable heating controls, providing full control over a single heating zone.  The advantage?  Wireless heating control for your room with a full range of time and temperature options.

EPH has come up with a product that’s not only functional and convenient, but also affordable.  EPH also focus on consistently improving their customer service.  Users have the option of having it fixed to a wall or have it free standing, letting you choose exactly where the most convenient place is.

EPH Combipack 4 Thermostat

It’s connected via bluetooth, so you can roam around your house with it.  With the thermostat’s excellent battery life, it’ll also continue giving those easy-to-use heating controls that you’ll be expecting from such an important device.

However, if you’re worried about struggling to understand the controls themselves, then fear not.  Not only is the EPH Combipack 4 Thermostat accessible and easy to use once your boiler’s installed, but you can also be taught afterwards how to use it.

Why do We Work with EPH?

Boilerhut work closely with EPH and provide it as the default new thermostat on all our quotes.  Not only is it less hassle, long lasting, affordable, but it is also compliant with the Boiler Plus Legislation 2018 for England, and soon Wales.

EPH Combi Pack 4 Thermostat is compliant with Boiler Plus Legislation 2018

Advantages of the EPH Combipack 4 Thermostat

The EPH Combipack 4 Thermostat allows you to select specific temperatures to be achieved at certain times of day.  For analog thermostats, the controls can often be too basic, and setting the temperature at a certain time becomes an unnecessary struggle.

This can usually cause issues if you have a varied work pattern.  Unless otherwise changed, a boiler would turn on at the same time each day.  If your working life demands varied shift patterns, the boiler’s schedule would potentially clash.

If you have a young family, babies should be in a room with a temperature somewhere between 16°C and 20°C.  For older residents, unmonitored temperatures can be harmful, so it’s important to stay on top of this throughout the day.

User-Friendly Interface

EPH Combipack 4 Thermostat

User-centric design is the key to development of the EPH Combipack 4 Thermostat.  With a large LCD screen and ergonomically designed keypad, it’s been designed specifically for ease of use. This includes added benefits for operating the thermostat in low-lit areas, or those with impaired vision.

To ensure a resident’s home remains a comfortable and visually friendly environment, the thermostat’s been designed with the same approach.  It boasts a sleek pure white versatile casing suitable for all types of interiors.

Programming Functions

A thermostat’s timer allows the user to choose what time of day the heating comes on, and to what temperature.  With the EPH Combipack 4 Thermostat, you have this same flexible control over how the boiler operates.  Functions include:

  • 7 Day Routine – Plan out your boiler’s behaviour over a week-long schedule
  • Full Day (weekend or weekday) – Specify the boiler activity each day as it comes
  • Holiday Mode – For when you’re away from the property.  Allows you to input several dates for the boiler to temporarily turn off.  The system will remain off until you return, or shortly before so your home is heated ready for your return.

Get the Best out of Your EPH Combipack 4 Thermostat

Knowing how to use the controls on your thermostat is vital to cutting down on your energy bills.  If done in the right way, your energy consumption can be minimised so that you’re comfortable and avoid overheating.

The EPH Combipack 4 Thermostat allows you to set a temperature for your home using the easy-to-use interface.  Once that’s achieved – usually about 19°C – the thermostat will ensure that the boiler switches off.  With your home cosy and warm, your boiler no longer overworks, meaning wasted money is a thing of the past.

Frequently Asked Questions

Too many people are using the controls!  How can I make sure just one person uses it?

If your kids or spouse are playing with the thermostat, it can throw the temperature off.  To prevent this from happening, you can lock the controls to ensure full control and a consistent performance.

To lock the keypad, press and hold the + and – buttons for 10 seconds.  A padlock symbol will now appear on the screen, showing that the keypad is now locked.  To unlock, press and hold the + and – buttons for 10 seconds.  The padlock symbol will then disappear from the screen.  The keypad is now unlocked.

I can’t see the screen properly.  Is the backlight not working?

There are two main settings for the backlight selection on the EPH Combipack 4 Thermostat, AUTO and OFF.  Chances are if the backlight isn’t turning on, it’s because OFF has been selected.  The factory default setting is AUTO, which sets the backlight on for 5 seconds when any button has been pressed.

To adjust the backlight setting, lower the cover on the front of the unit.  Press the ‘OK’ button for 5 seconds and then use the arrow buttons to select between OFF and AUTO.

How do I change the batteries?

It will be a long time before this needs to happen, but better safe than sorry!  Yes, you can!
The thermostat can be boosted to a specific temperature for 1, 2 or 3 hours while the thermostat is operating in all modes except for holiday mode.  Press the ‘BOOST’ button for the amount of hours you want it to be active, and the number will then flash on screen for confirmation.  If you do not press any other button, the boost will activate to the temperature displayed on the screen after 5 seconds.  Easy!

Does the thermostat provide any protection against frost?

It does, indeed!
If the thermostat is in OFF mode and the temperature drops below 5 ̊, the thermostat will automatically turn the boiler on to prevent any freezing. Although it’s not recommended, you’re also able to de-activate frost protection at any point.

Keep your Thermostat running smoothly

With every product, there are certain conditions that should be met to ensure it’s in the best possible condition.  For example, when using the thermostat, avoid placing it next to a source of heat to throw off the sensor.  Consider the following to make sure this doesn’t happen:

  1. Avoid keeping it near electric fires, TVs, lamps or anything else giving off significant heat – this may confuse the sensor.
  2. Ensure the air flow is clear around the thermostat itself.
  3. Position it away from the boiler itself.

Final Thoughts

The important thing to remember is that not all types of heating controls work with all types of heating systems.  Whether it’s a combination of a timer and digital or purely mechanical, it’s important to know what it would be used for before making a purchase.  With the EPH Combipack 4 Thermostat, you will be given full control over when your boiler is switched on and when it’s turned off by choosing the specific temperature.

With many types of living conditions, jobs and lifestyles there is a wide range of ways in which people spend their time in the house. It’s becoming more common that people are out of the house at very specific times, and so to be able to manage when your boiler heats up your home is becoming increasingly important. For a reliable, fully functional device that lets you have full control over how your boiler operates, buy the EPH Combipack 4 Thermostat.

24 replies
  1. Jennifer chapman
    Jennifer chapman says:

    I have my eph thermostat on manual as I like to control it myself, recently it’s been playing up and the back light will not go off and then I can’t move the up/down buttons at all. I think it’s faulty as it’s done this a few times. I wonder if anyone else has this problem.

    • Bryn Lloyd
      Bryn Lloyd says:

      Hi Jennifer,

      Thanks for the enquiry. The first thing you should do with any issue such as this is to contact the manufacturer directly. The number for EPH Thermostat customer service is 01933 626396.

      We hope this helps!

      Kind Regards,
      The Boilerhut Team

  2. Gary
    Gary says:

    We recently switched from oil to gas and have the EPH controls now. I got a brief rundown of how to use them before the Installer left. I’ve been trying g to set the heat to come on at specific times in the day. I’ve the first setting at 06 30 on Monday to Friday and 7.00 Saturday and Sunday. Control is on Auto, but the heat is coming on at random times ( 04.00 and 04.30 ) being 2 examplea, when it’s not meant to be coming on, not much ise after spending £2500 switching to gas. I found our old Oil control much easier to use

    • Bryn Lloyd
      Bryn Lloyd says:

      Hi Gary,

      Thanks for the enquiry!

      Our first suggestion would be to determine whether you’re having connectivity issues between the thermostat and your boiler. You can do this by calling EPH directly on 01933 626396O, where they’ll take you through the different steps needed for finding the cause of the problem. Using this procedure, you should be able to find the answer you need to ensure your thermostat behaves itself!

      Hope this helps!

      Kind Regards,
      The Boilerhut Team

    • KR45
      KR45 says:

      If you follow instructions on YouTube you should have no problems

  3. phill gardner
    phill gardner says:

    I have just had boiler/ EPH thermostat fitted. Room temp is set to 21degrees. How can I alter it to 20 degrees?

    DAVID WILSON says:

    just installed new gas boiler with EPH theromostat. We would usually have heating off in the summer, how do you set for domestic hot water only, or boost only for hot water?

    • Bryn Lloyd
      Bryn Lloyd says:

      Hi David,

      Thanks for the enquiry!

      For guidance on the thermostat, we recommend that you contact EPH directly to answer any questions. You can do this by calling them on their customer service line on 01933 626393.

      We hope this helps!

      Kind Regards,
      The Boilerhut Team

  5. Heather Patterson
    Heather Patterson says:

    I am having problems with the connectivity of my thermostat and receiver. Works fine for days then looses the connection…any ideas

    • Bryn Lloyd
      Bryn Lloyd says:

      Hi Heather,

      Thanks for the enquiry.

      For any issues with connectivity, we recommend contacting the manufacturer directly. For EPH, you can call their customer service number on 01933 626393.

      We hope this helps!

      Kind Regards,
      The Boilerhut Team

  6. Kristian Hookham
    Kristian Hookham says:

    Hi, I have this system in my flat. Is it possible to connect this to the app?

  7. Caroline Booth
    Caroline Booth says:

    Hi, you say this works on Bluetooth? Does that mean I have to have WiFi/internet at home for it to work?

  8. Andy Richardson
    Andy Richardson says:

    I have just had EPH when it reaches temperature required, how many degrees does it drop before the boiler is brought back in to bring it back to the required temperature again

      ELIZABETH says:

      I believe it is 0.4 degrees. Mine seems to be set to that. The reason for this is that if it was set much less ie 0 .1 degrees the boiler would constantly be turning on and off and it would wear out more quickly. I think there is a way of adjusting the differential in the installers menu. Best to check with EPH.

  9. Elizabeth Baroudi
    Elizabeth Baroudi says:

    I would like to know if I can set the required temp to be say 22.3 instead of the 0.5 degree increments my controls are set to.

  10. Peter
    Peter says:

    I have recently installed a EPH combi4 thermostat. After setting the date correctly the day displayed is one day ahead. Ie displays Mon when the actual day is Sun. Anybody know any fixes

  11. John
    John says:

    Hi there,

    Recently moved into an A rated house. Is there a recommend temperature to set the thermostat to? Currently on 18.5 degrees. Heating comes on approximately once every hour with the cold weather.

  12. Steve Blower
    Steve Blower says:

    I have just had a new Worcester Boiler installed together with the EPH CP4 Controller everything is fine . The only thing I want to change is the Auto Programme from a 5/2 Day Programme to a 7 Day Programme allowing me to have 2 days in the week set different to the rest of the week.. Can you tell me how to change from 5/5 to 7 Day please.

  13. George Millar
    George Millar says:

    Can I operate my EPH Combipack 4 via Alexa?

  14. Natalie
    Natalie says:

    We have a 14 month old EPH control thermostat, today we have no heating and the receiver is dead all the lights are off, tried to reset it etc but still no lights on the receiver and no heating, I have no idea what to do next?

    • Dean Ronnie
      Dean Ronnie says:

      Hi Natalie,

      Apologies for the late reply. However, if you are still having an issue with this, calling EPH directly will be the best option as they will be able to talk you through the solution. The UK telephone number for them is 01933 626 396.

      Let us know if there is anything further we can assist with.

  15. Cathy sewell
    Cathy sewell says:

    I want to know can I bring my controller back to factory settings as I’ve totally made a hash of setting it up, also can I get a hard copy of the instructions posted to me

    • Dean Ronnie
      Dean Ronnie says:

      Hi Cathy,

      Apologies for the late reply. However, if you are still having an issue with this, calling EPH directly will be the best option as they will be able to talk you through it and also provide the instructions you require. The UK telephone number for them is 01933 626 396.

      Let us know if there is anything further we can assist with.


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