Hi, my name is Mike and I have been in the home improvement and repair field for 20 years. I will be very glad to help you today. Is it in an unheated area? If so has it been colder than usual in there?
Sometimes when they are cold it will have that affect. If you unplug for about 30 minutes it should reset it.
There may be a fault with the control board or a blockage. If you remove the filter is there anything that has gotten behind it?
If that does not help then we will continue to work together to get it solved. If you have a space heater it may be a good idea to put that in there and warm the area. It could just be caused from the cooler air. Yes we will still work together to solve the issue. I am about to go out to a school function so my responses may be delayed but I will respond.
Great! I'll be back in a couple hours but I'll also check in periodically
Great! While you have the heater on you might as well leave it unplugged. It may take a while to get warm in there.