Brrrrrrrr!

Today it is 38 degrees F INSIDE the house! Upstairs in my old study. I've now moved my main computer into the downstairs bedroom, but the thermostat on my fan heater said 7C when I woke up this morning. What is wrong with this house? I have never lived in any place that has been this cold. It occurs to me that it might be haunted. After all, Mr Grumpy's previous partner died in the living room!