Yesterday it got colder in my house so I looked at my thermostat
It was no longer on Heat at 73 but Axillary Heat at 69
I yelped EEEEK !!! I thought it was broken
Oh No !!!
I had never seen that before !!!
I think its an automatic back up or something if the cold goes off the grid...
I put it back to Heat at 73 and it has been fine since
SCARY !!!!
Hunkered down in SE TN
>>Yesterday it got colder in my house so I looked at my thermostat
It was no longer on Heat at 73 but Axillary Heat at 69
I yelped EEEEK !!! I thought it was broken
Oh No !!!
I had never seen that before !!!
I think its an automatic back up or something if the cold goes off the grid...
I put it back to Heat at 73 and it has been fine since
SCARY !!!!
Hunkered down in SE TN
My home has two electric heat systems. The first is most efficient at temps above 40; nearly useless below that. The auxiliary heat costs more to run, but is needed when outdoor temps drop below 40 degrees. It also kicks in if the set temp is more than 4 degrees above the current indoor temp, which is why lowering the heat when leaving the house doesn’t always save you money. Psst... check your heating bill.
“Auxillary Heat at 69”
It will be a two-stage System. Thermostat will go into Heat1 at a few degrees below the goal. Heat2 is when you are like 5 degrees below. All it means is a stage two wired device kicks in. Your hvac may not even have that device. Usually Heat1 is heat pump, Heat2 is the electric heat coils. Heat1 draws maybe 3 or 4 kilowatts, Heat2 as much as 8 kw.
Just because thermostat display says something, does not mean the hardware exists. If system is older, thermostat may have been replaced since installation.