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BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22541
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Switched the mode on my Comfort Star mini-split from cool to

Customer Question

Switched the mode on my Comfort Star mini-split from cool to dry... System now no longer cools... Outside unit does not trigger. Is this a temp. Sensor issue?
Submitted: 2 years ago.
Category: HVAC
Expert:  BillyHvac replied 2 years ago.
Hello,
is the dry set point lower than the room humidity now?
Or are you saying that even turning back to cooling does not activate compressor?
use reply
Customer: replied 2 years ago.
The system was running on cool when I switched it to dry mode ( the house was cool enough and we just wanted to remove the humidity). I let it run on dry for a while and when I tried switching it back to cool the outside unit/compressor never kicked in. The inside unit works fine though ?!
Expert:  BillyHvac replied 2 years ago.
could you do me a favor and check to see what power is present at the outdoor unit disconnect?
Customer: replied 2 years ago.
Hi BillyThanks for your response.I did reply back yesterday but I guess it didn't make it through to you.So basically the system was running on cool when I decided to switch it to dry (temperature inside the house was comfortable but a little humid... Reason why I changed the mode).After having it run on dry for a while I switched the unit back to cool but no cold air came out... only temperate air is now coming out. I went outside to check on the compressor and sure enough nothing running. I then decided to flip the breaker off and back on but that didn't change anything.I also cleaned the filters on the inside unit...The defuser/inside unit is running fine... it just seems as though there's no communication between the inside and outside unit. Which is why I'm suspecting a thermostat issue.Hope that paints a clearer picture for you.Thanks in advance for your help on this.
Expert:  BillyHvac replied 2 years ago.
Do you happen to have a small box mounted on the side of the house by the outdoor unit? Is there 2 fuses inside this box?
Customer: replied 2 years ago.
No outside fuse box Billy. 120 goes directly in to outside unit. Took side panel off so you can see inside... Pic attached

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