Fujitsu Reverse air con not blowing heat anymore

sorry i was answering a question about a car ac/heater .. IDK what a fujitsu is

cool air or cold air? possibly a stuck reversing valve, possibly no condenser!

It should still be in warranty as Fujitsu usually goes for 5 years. Get in touch with Fujitsu to find a local warranty agent. There's not enough info in your post for a diagnosis. Are the lights flashing? If so, what sequence are they flashing? Does the indoor unit otherwise work normally in 'fan' mode? What model do you have?

This is a reverse cycle (heating and cooling) model. It sounds like you have it in heating mode. Check the Panasonic website for an owners manual.

Its probably not the thermostat. The air conditioner may be stuck on heating mode. If its a reverse cycle, the reversing valve may be jammed so even when the thermostat is calling for cold air, it stays on heat. If the machine is on heating mode, it should be blowing cold air out of the outdoor unit of the air con. If its on cooling mode, the outdoor should be blowing hot air.

Is there a dial control to change the heat setting from 1 to 10? Even if you have it on heat, if you turn it to the lowest setting (which is to cool) it would still blow cold air. Turn it up to ten - all the way and see if that solves your problem.

Also check to see if the button that says heat or air is on upside down. Pull it off and turn it over if thats the case.

If you feel cool air near blower, you have to service your unit completely. Because it's giving cool but not removing heat from room due to coil and air filter blocking. Helpful?

you have a slow leak in your refrigerant and need to find the leak. you will have to get an AC repairman to come to your house and check it for leaks and fix the problem.

Sounds like you have it in heating mode or it is low on charge. In cooling mode, the outside fan should blow hot air not cold.

same as car aircon, but uses different kinds of freon. check first the thermostat setting, may be it set too high. set it to 20'c. if still not cooling, check wiring on ACCU, check capacitor too.