Air source heat pumps (ASHPs) have gained immense popularity in recent years due to their energy efficiency and ability to provide both heating and cooling. However, homeowners often wonder, “Can you turn off an air source heat pump?” The answer is yes, but understanding the implications and proper procedures is crucial.
Why Turn Off an ASHP?
There are several reasons why you might want to turn off your ASHP:
- Maintenance: Regular maintenance and repairs may require turning off the unit.
- Extreme Weather: During extreme cold or hot weather, it may be necessary to turn off the ASHP to prevent damage.
- Moving: If you’re moving out of your home, you’ll need to turn off the ASHP before leaving.
How to Turn Off an ASHP
1. Locate the Disconnect Switch:
Usually found near the outdoor unit, the disconnect switch is a safety mechanism that cuts off power to the ASHP.
2. Turn Off the Disconnect Switch:
Switch the disconnect switch to the “OFF” position. This will cut power to the outdoor unit and stop the ASHP from operating.
3. Turn Off the Thermostat:
Inside your home, turn off the thermostat that controls the ASHP. This will prevent the thermostat from sending signals to the outdoor unit.
4. Wait for the Fan to Stop:
After turning off the thermostat, the outdoor fan may continue running for a few minutes until it cools down. Wait until the fan has completely stopped before proceeding.
Potential Consequences of Turning Off an ASHP
1. Loss of Heating or Cooling:
Obviously, turning off the ASHP will result in the loss of heating or cooling in your home.
2. Frozen Pipes:
In cold climates, turning off the ASHP during winter can lead to frozen pipes if the indoor temperature drops too low.
3. Heat Loss from Frozen Heat Pump:
If the ASHP is turned off in freezing temperatures, the water in the outdoor unit can freeze and expand, potentially damaging the heat pump.
When to Turn Off an ASHP
1. For Maintenance or Repairs:
Always turn off the ASHP before performing any maintenance or repairs to avoid electrical hazards.
2. During Extreme Weather:
In extreme cold or heat, consider turning off the ASHP to prevent damage or strain on the system.
3. When Moving:
If you’re moving out of your home, turn off the ASHP and disconnect it from the power supply.
When NOT to Turn Off an ASHP
1. During Mild Weather:
In mild weather conditions, it’s generally not necessary to turn off the ASHP.
2. When Away for Short Periods:
If you’re only going away for a few days, it’s usually better to leave the ASHP running on a lower setting to maintain a comfortable indoor temperature.
3. For Energy Savings:
Turning off the ASHP only for short periods will not significantly save energy. In fact, it may use more energy to restart the system.
Troubleshooting Common Problems
1. ASHP Won’t Turn Off:
- Check if the disconnect switch is properly turned off.
- If the disconnect switch is off but the ASHP is still running, contact a qualified technician.
2. ASHP Turns Off Prematurely:
- Check if the thermostat is set too high or too low.
- If the thermostat is set correctly, the ASHP may be experiencing a problem. Call a technician for assistance.
What You Need to Learn
1. Can I turn off the ASHP for a vacation?
Yes, but only if you’re going away for an extended period (more than a week). Otherwise, it’s better to leave the ASHP running on a lower setting.
2. How long can I turn off the ASHP in the winter?
In mild climates, you can turn off the ASHP for a few days without risk of frozen pipes. In colder climates, it’s not recommended to turn off the ASHP for more than 24 hours.
3. Can I turn off the ASHP if my power goes out?
Yes, but turn it off using the disconnect switch, not the thermostat. When power is restored, wait at least 5 minutes before turning the ASHP back on.
