Replaced filter but it's now stopped working. The orange light goes on but the fan won't start. Is there a reset button that needs to be tripped?

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You are using too restrictive of an air filter. If the codes you are getting off the lights says anything about a high limit this is the cause of your blower running all the time. Use a less restrictive filter or have your contractor install a media filter in the system. if you reset the furnace and it does not stop running the blower you have a stuck limit switch and may have to get another or call a service tech to reset it or replace.

clean ligth its means still have dirt in filter or any,,,just clean and its will goes by its self,,
if not try to off an on again,but still the same,,its means the sensor need to replace,call for the service technician,dont waste time and money if you dont have any idea for the repair

I was having the same issue. I noticed that when the main fan unit was removed, there was a small plastic piece that was sticking up from the base next to the filter, which has a female end on the fan unit. I played with this, and realized I could lift it up. Once I did this, I replaced the fan unit and it started working. I think this is the water level reader which, when all the way down, won't allow the fan to start since it thinks there is no water.

After you lift off the reservoir, there are two grey twist locks (one on the left, one on the right. When you twist these, the bottom can be removed from the unit, which contains the filters.

that switch is a pressure switch that trips when the freon pressure get to high usally the problem is the coils on the unit are clogged water alone is usally not enough home depot sells a spray can of coil cleaner back were u would find the air filters depending your store follow directions CARFULLY and this sould sovle the problem.

if it comes on when turned to RESET then its probably fine. The humidity may be higher than the highest setting on the stat. If you leave it on test reset it will not work .

If you would like to buy a new tower without a tank, I will be happy to sell mine.

How long are you going between filter changes?

A filter that stops wicking water up and turns orange/yellow is one full of deposits.

It sounds like you have hard water. How are you filtering this water before you use it? Distilled water is the best.

Replace the filter. They don't last forever. Mine normally last a month to a month and a half.

Good Luck