Fan blows but no heat. Green light flashes four times

Called Flash Codes. First try turning off everything at the breaker for at least 2 hours and preferably overnight. Turn back on and wait 15 minutes for self test to complete.

https://www.orionair.co.uk/PDF/fujitsu-trouble-shooting.pdf

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Steady light on - normal operation.
One flash - ignition failure.
Two flashes - combustion air switch stuck closed.
Three flashes - combustion air switch failed to close.
Four flashes - limit switch open.
Five flashes - gas valve energized with no call for heat.
Rapid flashing - reversed polarity.

Note: Color of light is green.

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The red light (operation) flashing 5 times can be one of four things depending on the green light (timer) but the green light should flash at the same rate as the red light, not faster - either 2,3,5 or 6 times. Anything other than these is abnormal and you will need a tech to diagnose.
Could be a faulty controller board or compressor.

Here is a link to the error codes.
http://www.fullyairconditioned.com.au/images/uploaded/files/fujitsu%20fault%20code%2
0split%20system.pdf


Hope you find an answer there.

YOU MOST LIKELY NEED A NEW THERMOSTAT. You need to make sure you get the correct one they are not all the same.. you will also need to set how long the fan stays on after its stops heating the ducts If you have your owners Manuel look and see what kind it calls for. If your talking about a manufactured home it will be with all of correspondence.. I hope this was helpful and the green light is good but not blinking

Perhaps it needs the bulb, but there is also a good possibility that the lamp fan is getting clogged and shutting down the set. This is NOT the fan you see in the back, instead, it is above the lamp, and is a small blower-type fan, that tends to clog with dust. You CAN check this, when you open the lamp door,you can see the blower wheel, and if it is all dusty, it needs to be cleaned out--but do NOT just blow it out, or you might clog the engine!! It needs to be removed, and cleaned out of the set.

But first...if the blower is not too dirty...try another lamp.

There is no less than two Cooling Fans on the right side. Either one of them could cause the problem. The one that turns slow or stops turning quickly is the one that is probably causing the problem.
I hope this helps,
Sky Assoc

remove the battery
clean the connecting ends of ur laptop & battery,
plug it back in & then start it...

is there a venting fan, that may be faulty not sending power to heat