Are you ready to turn on the heat?

Winter is approaching, the weather is getting colder and it’s time to turn on the heat.

But are your radiators ready?


This is what you can do to ensure that your old radiators functions and performs optimally:

- Turn your radiators ALL the way up. When you do this your radiators should become warm ALL over.

If they do you’re ready for winter, but if they only get partially warm, you need to take action.

And one action could be to bleed your radiators – let air out of them. It sounds dramatic, but in fact it’s a simple and straight forward operation.

- Turn down the heat and turn the bleed screw at the top end of your radiator.

Have some kitchen towels or a cloth to catch any drips. You should hear hissing which indicates that air is being forced out by the water.

As soon as water squirts through the bleed screw, re-tighten it and make sure it is not leaking before moving on to the next radiator!
If you radiator still doesn’t heat properly, you might have a blocked radiator valve, It can happen after long periods without use, e.g. from spring to autumn, material from the water can deposit on the valve pin causing it to stick.

In order to solve the problem the sensor must be removed from the valve.

When the sensor has been removed from the valve, you gently push down the pin protruding from the valve (never pull!).
The pin should be able to move 2-3 mm in and then bounce out again - otherwise it is stuck.

In order to loosen a stuck pin you can try changing between gently beating the valve on the side and pushing down the pin until the pin again moves freely.

When it is again moving freely, you can re-attach the sensor. But before you do, make sure that there’s no leakage or dripping from the stuffing box.

Remove the sensor

The radiator valve appears

Push the pin in and out 

If the above procedure is not successful, you should contact the heating technician.

Rules of thumb
When using radiators there are a few good rules of thumb to remember:

- It’s always a good idea to use all radiators in a room. You save nothing by having one on full throttle and the others closed. In fact a fully heated radiator will use more heat than 2 or 3 that are turned only ¼ up. This is especially true when you use district heating.

- When ventilating a room: Turn down your thermostat – leave windows open for 5-6 minutes – create draft – walls and furniture will remain warm. If you don’t turn down your thermostat – it will react to the draft and cold by turning up the heat automatically.

- Always maintain a minimum of 16 degrees in all rooms. Never go below 14 degrees as this might damage the building and cause damp, condensation and mould.

- You can save money and energy by turning down your radiators at night. But if you turn them down more than 3 degrees all the money saved will be used on reheating the room again.

If you find it difficult to achieve the right and constant temperature in your house – one of the reasons might be the placement of your thermostats. If they are hidden behind a curtain or in direct sunlight it will be difficult for the thermostat to register the exact room temperature.

A solution would be to install a Danfoss remote sensor. If you choose a remote sensor that fits your old valve you don’t even have to drain the radiator before you attach it.