The selection arrow next to "Heat" is flashing and "Heat" is not flashing. There is a clicking noise that can be heard as well.
The only thing I can find via the online Manual for the Carrier Thermidistat TSTATCCPRH01-B is this:
EQUIPMENT ON Indicator is displayed…
When the cooling equipment is operating, the word COOL preceded by a small triangle is displayed below the cooling set point. When the heating equipment is operating, the word HEAT preceded by a small triangle is displayed below the heating set point.
If the equipment turn on is being delayed, the triangle and the word will flash.
NOTE: This indicator does not reflect a problem with your system
My question is: What does the flashing arrow mean? if it doesn't reflect a problem with your system???
The inside temp this morning was 62 - the outside temp is 40 - too cold!!
The repairman has been called and should be on his way - I'm just curious to see if there is an answer to the question.