Energy Efficiency/ CoGeneration

Many things can cause high electric bills. This includes estimations of the previous month, or poorly insulated homes

Ruling this out usually leaves one culprit - The Heating System, specifically if it is a heat pump. The electric bill will be high in the coldest months because that is when the back-up heat is on the most. But if electric bills are higher than normal it may mean a sign of a problem with the heat pump.
This can range from minor things like a dirty air filter or an iced-up outdoor unit to major problems like a bad compressor Here’s a list of possible causes.

• Outdoor unit not running, using back-up heat
• Low refrigerant charge
• Poor efficiency- needs cleaning and servicing
• Bad reversing valve
• Bad compressor
• Compressor not running
• Stuck in A/C mode
• Outdoor unit iced-up
• Snow drift against outdoor unit
• Dirty air filter.