A few weeks back someone mentioned a faulty fridge freezer where the compressor may be running 100% with an estimated annual cost of around £100.
I have a 20 year old under counter larder fridge that has reached the end of its life. I had an extended break away from home and switched all but the essentials off before going. The router, PVR, phone, fridge and freezer were left on. I came back to an electricity usage higher than expected (smart meter monitoring). The max/min readings from the fridge monitoring were around 8 degrees centigrade apart, so its not regulating temperature that well. For the past 4 days I've had the fridge on a plug in power meter and this has revealed approx 0.9kWh per day with the compressor running for around 70% of the time.
This would be equivalent to an annual cost of around £105. If the compressor was on 100% the annual cost would be £150.
A new fridge will be delivered early next week.
Finding a suitable fridge of 0.5m width to fit in the existing space was a bit of a problem as most models are now 0.55m to 0.6m wide, or the few at 0.47m are so shallow that they are very limited for internal space.
In the end I found a Liebherr T1400 model which is slightly taller and deeper than my existing fridge but will fit in the space available.