To put it simply, a heat pump is “first stage” heating, and emergency heat is a “second stage” or “back up” heating source. When emergency heating is activated will depend on your thermostat system, as each system will have a different way of determining when emergency heat is needed to assist first stage heating.
What does EM heat mean on AC?
The first part of the phrase “EM heat” stands for emergency. The emergency heat setting on your thermostat controls your heating system’s auxiliary heat source, which can be tapped into when outside temperatures drop below a certain threshold—usually anything colder than 35 to 40 degrees Fahrenheit.
What is EM heat on Honeywell home?
The EM HT (Emergency Heat) feature allows the user to use a backup heat source when the heat pump is not working. The Emergency Heat feature locks out the heat pump compressor so that only backup heat is used. This is typically used until a heating and/or cooling contractor can troubleshoot or fix the heat pump system.
When should I turn on EM heat?
The emergency heat should only be turned on by the homeowner in emergency situations when something happens to the first stage heat source – your heat pump. For example, if during an ice storm a tree is knocked down and damages your outdoor unit, you should switch on your emergency heat and call an HVAC professional.
Does EM heat use more electricity?
Because emergency heat relies on the secondary stage heat source, it does cause a spike in the cost of electricity.
Does EM heat cost more?
Using Emergency Heat May Cause Higher Heating Bills: Emergency heat is more expensive than its traditional counterpart, so you will probably see a spike in your utility bills if you need to use it. You should use emergency heat for the shortest period of time possible.
Why is my heat blowing cold air?
A clogged filter is one of the leading reasons for a heater blowing cold air. But even if you swap the air filter with a brand new one, dirt and debris can still be found within the unit. This could eventually lead to overheating. If your furnace looks pretty dirty, call an HVAC provider for a professional clean.
Is it OK to run emergency heat?
Emergency heat without air movement can cause damage do your outdoor unit. You should never turn on the Emergency Heat manually, unless your heat pump has failed completely. If that is the case, you should have your heating unit examined and repaired immediately.
Does Honeywell thermostat have emergency heat?
EM heat on the Honeywell Thermostat stands for Emergency heat, which switches the thermostat from primary mode to auxiliary mode. It utilizes a backup electric heat strip or gas furnace to heat up the room.
Will my heat pump automatically switch emergency heat?
Your heat pump is an intelligent machine. It has settings that tell it when its efforts to heat your home aren’t working and automatically switches to second-stage heating. When the target temperature is reached, the backup heater turns off and first-stage heating resumes.
When should I turn off my heat pump?
Heat pumps do not operate as efficiently when temperatures drop to between 25 and 40 degrees Fahrenheit for most systems. A heat pump works best when the temperature is above 40. Once outdoor temperatures drop to 40 degrees, heat pumps start losing efficiency, and they consume more energy to do their jobs.
Can I use emergency heat all winter?
Heat pumps are an excellent option for cooling homes in the summer and heating them in the winter. However, unlike a gas furnace, it can only produce a limited amount of heat. The colder it gets outdoors, the less effective heat pumps are at heating your home.
Do heat pumps work below freezing?
Yes, heat pumps will still work even below freezing, especially modern ones. Good heat pumps will still perform efficiently at 25 degrees Fahrenheit. When temperatures exceed this, you’ll notice performance loss.
Should I run my heat pump on emergency heat?
Short answer: You should only set your heat pump’s thermostat to “emergency heat” when your heat pump stops heating altogether. And in that case, you should also call a professional for help.
