Ask Experts Questions for FREE Help !
Ask
    portac1058's Avatar
    portac1058 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jul 22, 2008, 06:36 PM
    Fuses Blowing on Circuit Board
    The 3A fuse on my circuit board keeps on blowing. After I replace the fuse, the evaporator coil blower will run just fine, but, when I try to turn on the A/C, the fuse blows, everything shuts down and then nothing comes on. I'm guessing the relay inside the condensing unit is probably shorting out. Does this sound reasonable? Can I test the relay to see if it is faulty?
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #2

    Jul 22, 2008, 06:46 PM
    Look at the windings on Contactor for discoloration or burnt. For a quick test remove both wires from contactor coil, insulate, turn to cool. If it still blows, short may be in control wiring, also, try Fan only, to make sure not blower relay/contactor not shorted.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #3

    Jul 22, 2008, 07:48 PM
    What may be more likely, is a dog cewed the tstat line outside. Inspect.
    portac1058's Avatar
    portac1058 Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Jul 25, 2008, 01:29 PM
    Pulled the 24v wires off the outside unit and it didn't trip when on "cool". I replaced the contactor even though it didn't look burnt and unit is only 18 months old. Condenser fired right up without blowing the fuse! Works fine now. Thanks.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #5

    Jul 25, 2008, 04:16 PM
    Good Deal.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Air conditioner keeps blowing fuse in circuit board [ 5 Answers ]

Hello, I Am Having A Problem With My Carrier Weathermaker 8000 Air Conditioning. It Keeps Blowing The Fuse In The Circuit Board Inside The Furnace Unit. Yesterday I Checked The Wiring Inside The Thermostat Tightened A Couple Of Wires And The Unit Started ( Yea) But It Ran Continuously For...

Fuses blowing [ 2 Answers ]

Hello. I hope someone can help me. I have a 38” Weed Eater riding mower with a 12.5 hp Briggs & Stratton engine. I keep blowing the 30 amp fuse that is located right next to the battery. I can change out the fuse with a new one and the mower will fire right up and run great. I am not sure at...

Blowing fuses [ 1 Answers ]

York heat pump,Have cold air all summer,fan alone runs fine,emergency heat works great,But when you turn it to heat only it will blow fuse,could it be a control board on the inside... Thats what I'm being told now.. by a service tech... By the way THANKS for the help so far... Heater coils have...

Blowing fuses [ 1 Answers ]

Had new thermostat installed,most everything on this york unit has been checked,couldn't find a problem,boards,contacts,relays all checked out to be fine,still blowing 5 amp fuse when calling for heat??

Fuses blowing [ 2 Answers ]

:confused: My clothes dryer started blowing fuses. Since it was a 1964 model, we assumed it was on it's last legs and bought a new one. The new dryer is also starting to blow fuses. The dryer is on a separate fuse box from everything else. Nothing has changed where the dryer or fuse box was...

View more questions Search