Contact the manufacturer and inquire if they repair or replace the units with freon leaks. Also ask them if they can refer a repair shop near the town you live in. Quite simply, putting more freon in it will leak out and it will keep freezing up. Fix the leak. >>>> More times than not the leak is not in the coils. It could be any one of the 4 piping connections (2 on the furnace and 2 on the condenser) and if the installer did not use a single line set, any of those additional joints as well or somewhere else in the condenser. Coil leaks are rare for the most part. Usually the hardest part of leak repair is finding it.
I have this same type of sill furnace and the filters goes on the inside closest to the blower.
The water inside a hose can freeze.
A thermometer....
He was placed inside of Laozi's 8 Trigram furnace.
Make sure the condensation water, inside the furnace, is draining out. You probably should check the coil, inside the furnace and clean it.
An oven heats objects inside of a chamber, a furnace heats the air around it.
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If you mean where can you find it, look on the inside of one of the cabinet covers or the control box cover of the furnace.
The whole ocean would freeze if it was cold enough.
No, but there is a minecart with a furnace inside.
On the inside of one of the removable panels
thermocouplesInfrared pyrometer