I have a international confort producr COMFORTMAKER heater in my house. ANd noticed that burner is on for 10 second and off for 3 second and do continously. Think something wrong but do not know waht is going on. Sometime blower not on when in auto mode then hear clicking sound all the time then when I turn fan on then blower start. Is this thermo controller problem of some kind of sensor in the furnace.
"I agree with Beenthere. My coil is dirty, but that is not what caused my current problem."
So you know your Evaporator coil is dirty, preventing proper airflow out of the furnace, but you are not going to clean it.
Beenthere might very well be correct, as I have followed his posts, and found him to be an excellent HVAC professional.
It is my opinion that dirt, debris, and corrosion are usually the culprits that cause the original problems in the first place, so getting your unit as clean as possible is always the starting point for logical deductive reasoning.
I think Beenthere will second me on this train of thought.
The water built up so high in your collector box due to lack of service that it flowed into your pressure switch. I would definitely replace it, after a thorough cleaning of your system, including your secondary heat exchanger. and all lines.
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