Fridge and Water heater work on gas only?

Hi - I'm getting my TT ready for the weekend and plugged up the power as usual to get the fridge cold, and the fridge will not work. I hear it trying to, but it won't go. So i thought i'd try the water heater on the electric setting rather than gas, and it won't work either. I can hear them both clicking but they won't start up. I know i have power to the TT - the microwave display is on, etc. Fuses look okay, and i've flipped the main power off and on a couple of times. What am i missing? Thanks in advance!