Most people will have no choice but to crank up the central heating to cope with the bitterly cold temperatures.
An issue with a damaged check valve can cause the gas tank to expand into exhaust components, melting the tank.
David said: "It's advisable to consider turning on your heating when indoor temperatures consistently drop below 18C (64F).
David said: “It’s advisable to consider turning on your heating when indoor temperatures consistently drop below 18C (64F).
Radiators are designed to be completely full of water, but when air gets into the system it rises to the top and stops hot water flowing smoothly.
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