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BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22092
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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My uni is not cooling,went outside to check and fan blades

Customer Question

my uni is not cooling,went outside to check and fan blades are not turning I can hear a hum
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.
hello,
while it is humming, and if you spin the fan blade, does it start
Customer: replied 1 year ago.
i have not tried that
will I have to take the cover off
Expert:  BillyHvac replied 1 year ago.
no..just reach in with something thin
ruler. stick etc
Customer: replied 1 year ago.
nothing happens
Expert:  BillyHvac replied 1 year ago.
there are 2 pipes leaving the unit...feel them..is there any temp difference?
Customer: replied 1 year ago.
no they both feel barely cool
Expert:  BillyHvac replied 1 year ago.
ok the humming is likely the contactor pulled in.
You could have tripped breaker
Blown fuse in disconnect
Bad contactor
It would require a meter to check for 240v
Customer: replied 1 year ago.
do i need to turn the unit off
Expert:  BillyHvac replied 1 year ago.
Yes...until it can checked with a meter for proper power