Short Answer
Overview
Permanent hold is a function found on programmable and smart thermostats that allows the user to override the pre-set heating or cooling schedule indefinitely. Unlike a temporary hold, which reverts to the scheduled program at the next transition period, a permanent hold maintains the selected temperature until the user manually cancels the setting. This feature provides manual control similar to non-programmable thermostats while retaining the hardware capabilities of advanced units.
History / Background
The concept of holding a temperature setting originated with manual thermostats, which maintained a single temperature until physically adjusted. With the advent of programmable thermostats in the late 20th century, manufacturers introduced hold functions to allow flexibility within automated schedules. Early digital models distinguished between temporary and permanent overrides to balance energy savings with user comfort. As smart thermostat technology evolved in the 21st century, the permanent hold feature remained standard, though some algorithms now suggest energy-efficient adjustments even during hold periods.
Importance and Impact
This function significantly impacts energy consumption and HVAC system longevity. When engaged permanently, the thermostat ignores energy-saving setpoints programmed for unoccupied times, potentially increasing utility costs. However, it ensures consistent comfort during irregular schedules, such as holidays or illness. The impact on the HVAC system depends on the set temperature; extreme settings during hold modes can cause excessive cycling or continuous operation.
Why It Matters
Understanding permanent hold is essential for homeowners seeking to balance comfort with efficiency. Users often activate this feature unintentionally, leading to higher energy bills without realizing the schedule is bypassed. Conversely, knowing how to utilize permanent hold allows for effective temperature management during vacations or unexpected schedule changes. Proper usage ensures the thermostat operates according to the homeowner’s current needs rather than a rigid calendar.
Common Misconceptions
Permanent hold saves more energy than a schedule.
Permanent hold typically consumes more energy because it prevents the system from entering eco-friendly setback modes during unoccupied periods.
Permanent hold and temporary hold are the same.
Temporary hold reverts to the schedule automatically at the next programmed time, while permanent hold continues indefinitely until canceled.
FAQ
How do I cancel a permanent hold?
Press the Run Schedule or Cancel Hold button to resume normal programming.
Does permanent hold damage the HVAC system?
No, but extreme temperatures may cause excessive wear or higher energy usage.
Is permanent hold suitable for vacations?
Yes, it is often used to maintain a safe temperature while away for extended periods.
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