Heat auxiliary, also known as auxiliary heat or backup heat, is a secondary heating system integrated into heat pump installations. It activates when outdoor temperatures drop too low for the heat pump to efficiently extract heat, typically using electric resistance coils or a gas furnace to maintain indoor comfort.
A flashing ‘Cool On’ indicator typically signifies that a cooling system, such as an HVAC unit or a vehicle’s climate control, is in a transitional state or experiencing a fault. Depending on the device, it may indicate a delay in compressor startup or a system error requiring maintenance.
When a heater delivers cold air instead of warm, it signals a problem in the heating cycle. Common causes include thermostat errors, ignition failures, clogged filters, or safety switches. Understanding these issues helps homeowners troubleshoot or decide when to seek professional help.
CFM, or cubic feet per minute, is a measurement of airflow indicating how much air a fan moves in one minute. It is crucial for assessing the performance and efficiency of fans in various applications.
In the context of thermostats, ‘Recovery’ refers to the period during which a heating or cooling system works to return the indoor temperature to a specific set point after a scheduled change. This process is central to energy-saving strategies like setback programming.
Cycle delay on a Vivint thermostat is a protective feature that prevents HVAC systems from restarting too quickly after shutdown. This function safeguards equipment compressors from damage caused by short cycling and pressure imbalances. It is a standard setting designed to extend the lifespan of heating and cooling units.
The label “Reco” that appears on many modern thermostats is an abbreviation for a specific operating mode, most commonly “Recovery”. It indicates that the system is pre‑conditioning the indoor space so that the desired temperature will be reached at a scheduled time. Understanding this feature helps users interpret thermostat displays and optimise comfort and energy use.
The “Hold” function on a thermostat temporarily or permanently overrides the programmed schedule, keeping the heating or cooling system at a set temperature until the hold is cancelled or the schedule resumes.
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The terms ‘Re’ and ‘Co’ on a thermostat typically refer to the red and common wires used in HVAC systems. They are part of the wiring that connects the thermostat to the heating and cooling equipment to control temperature settings.