To make your heat pump more efficient in winter, maintain a steady thermostat setting rather than drastically adjusting it, and keep the outdoor unit completely clear of snow, leaves, and debris. Regularly check and clean indoor air filters to ensure proper airflow.
Before you assume it's too cold for your heat pump, try some adjustments, like:
Heat pumps often struggle in cold weather because they pull heat from outdoor air, and winter air simply has less heat to move indoors. That's why rooms feel uneven, and the system never seems to shut off.
The best mode for a heat pump in winter is the dedicated "HEAT" setting (often represented by a sun icon). Manually set your thermostat to a comfortable, steady temperature and leave it there, as heat pumps are highly efficient at maintaining a constant temperature.
In mild winter weather, a heat pump should typically run for 2 to 3 hours a day, cycling on and off in short intervals. However, in freezing temperatures (below 30°F), it is perfectly normal for the system to run constantly or nearly 24/7 to maintain a steady temperature.
The "20-degree rule" for heat pumps and air conditioners refers to the recommended limit on the temperature difference between the outside air and the indoor air. During summer, experts advise that you do not set your thermostat more than 20 degrees cooler than the outdoor temperature.
The "30-minute heating rule" is a highly efficient, money-saving thermostat strategy that involves turning your heating system on 30 minutes before you need a space warmed up, and turning it off 30 minutes before you no longer need it.
If your electric bill is unusually high, your heat pump is likely relying heavily on backup "strip" heat (which consumes significantly more electricity) during cold weather, the thermostat is set too high or incorrectly wired, or your home lacks adequate insulation.
Yes, it is perfectly okay for a heat pump to run all night. In fact, heat pumps operate most efficiently when set to a steady temperature and left to run continuously, as this avoids energy spikes and heavy strain on the system.
Not inherently, but it is higher than the recommended settings for energy savings. While 72°F is highly comfortable, setting your thermostat to 68°F during the day and lowering it further at night can significantly reduce your heating bill.
No, you should not turn your heat pump off in extreme cold. Modern systems are designed to operate continuously. Turning the unit off entirely forces your home's backup or auxiliary heaters to work harder and longer to maintain a comfortable temperature, which dramatically increases your electricity consumption.
Typically, a properly sized furnace will run for about 10–15 minutes per cycle during colder months. If your furnace turns on every few minutes, it may be short cycling, which can indicate issues such as a clogged filter, blocked vents, or an oversized unit.
In mild winter weather, a properly functioning heat pump should kick on 2 to 3 times per hour, with each cycle lasting about 10 to 15 minutes. However, on freezing days, it is completely normal for the system to run for much longer periods or even continuously to maintain your set temperature.
The most efficient heat pump setting for winter is a consistent temperature close to your comfort level, typically around 68 degrees, without frequent thermostat adjustments.
Set your heat pump to 24°C in dry mode.
Maintaining Heat Pumps in Snowy Conditions
Keep Outdoor Unit Clear of Snow If your heat pump does become blocked with snow it will reduce the efficiency of your system and may cause damage to the unit. Snow falling will not typically affect the operation of your heat pump unless the unit is buried.
Heat Pump Runtime: What to Expect
On average, a heat pump runs in cycles for about 2–3 hours per day. However, this can fluctuate based on the factors listed above. During extreme weather conditions, your system may run continuously to maintain a comfortable environment.
The major disadvantage of a heat pump is its reduced efficiency in sub-freezing weather. Because they extract ambient heat from the outside air rather than generating it, heat pumps struggle to warm homes in extremely cold climates without supplemental backup heat.
Heat pumps operate most efficiently when holding a steady temperature. Turning heat pumps down when you're away or asleep may actually use more energy than leaving them on. The reason is that they have to work harder to come back to the desired temperature than they do to maintain it.
To tell if a heat pump is overcharged, look for high operating pressures, high subcooling, and physical symptoms like poor cooling, rapid on/off cycling (short-cycling), or a hot compressor.
This is especially true if your house has a heat pump. Heat pumps are most efficient until temperatures fall below 30 degrees outside. Once the temps dip below that, heat pumps can't run as efficiently to keep up with the cold, and backup electricity often kicks on.
Your HVAC system (heating and cooling) is the primary appliance that can double your electric bill. Space heating and air conditioning account for nearly 50% of your home's total annual energy consumption.
Known for his practical tips, Lewis introduced the '4pm rule' which involves using curtains strategically to retain heat. He suggests opening curtains when the sun rises at around 8:30am to let in natural warmth, and closing them by 4pm to keep the heat inside.
Heating and cooling (HVAC) systems are the biggest energy consumers in a typical home, accounting for about 40–50% of your total electricity bill. Water heating, refrigerators, and lighting follow closely behind.
If your thermostat is set to 20°C (68°F) but your home still feels chilly, it is likely due to radiant heat loss, drafts, or high humidity. The temperature of the air isn't the only thing that dictates how warm you feel.