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Bryant A/C Condenser unit outside will not come on...replaced 3 amp fuse and checked connections...only hums outside but does not kick on... HELP!

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That is a ruptured capacitor. If the top of it looks puffed up it is failed and nothing but a hum will thou get.Bryant A/C Condenser unit outside - 5d838cf.jpg

Posted on May 10, 2009

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My fan is nto blowing on my outside unit. i hear a light hum coming from the unit.


Sounds like the contactor is pulled in, but no power to the condenser fan motor. Check power to motor (through the contactor & check the capacitor.

Jul 11, 2011 | Bryant 463AAC008BA Air Conditioner

1 Answer

We have a 6 year old air conditioner Byrant 591B. The outside unit is not working it make a slight hum when the thermostat is set to cool, but the fan does not run. The furnace is working fine


You picked the wrong picture...lol. You have a split system and that humm you hear comes from the contactor. That means the thermostat is asking the compressor which is outside to come on. If you hear the humm but nothing is working, Check the breaker and then replace the fuses in your fuse box by the condensing unit, or the outside unit if the breakers are OK. It should have a disconnect between 3 to 10 feet of the unit depending on your codes and city requirements. No matter what, if you stand at your unit and look at the conduit, it will lead to your electrical disconnect. It could be a sub-breaker or fuses. It is usually fuses because a breaker could take up to 6 sin waves to respond as where a fuse could take only 2 sin waves. Replace both fuses. As time goes on, fuses become warn from constant load changes and heat and sooner a latter, they just wear out like any other component. Change the fuses and fire your unit back up. If it pops the new breakers, you have other issues and it's time to call an HVAC guys.

Sep 28, 2010 | Bryant 462AJC021BA Air Conditioner

1 Answer

The inside unit on my Bryant is working. The fan is on. However the outside unit is not running. I changed fuses and it worked for approxmately 20 minutes then stopped again. Any suggestions?


I would think that when you changed the fuses you 'cured' the problem - which was a blown fuse(s) - but now you have the same problem again - a bad fuse(s).

To test this - you could replace the fuses again - but first - I would make sure that the fuses you are using are 'time-delay' fuses. It should say on the fuse itself 'time-delay' or 'dual-delay' or something like that.

If you're using fuses that are not 'time-delay' your problem could be solved as easy as buying some 'time-delay' fuses.

However, -- fuses blowing -- are usually caused by electrical motors - i.e. compressor/fan motors - breaking down 'electrically' - and heating up and causing the amp draw to increase past the point of the fuses, i.e. a 40 amp fuse will blow when the AC starts to exceeds that rating.

One "longshot possibility" - is - if the condenser is 'really dirty' - it will cause the compressor to run hot and possibly cause the fuses to blow. I would make sure 'all power' including the inside thermostat is "off" - and then 'wash out' the condenser (the coil in the outside unit) real good with a water hose.

Of course another possibility is that you have a loose electrical connection(s) somewhere in the AC. If you're inclined to - you can again - make sure all power is off - and poke around in your AC looking for loose wire connections. Just be sure 'all power' is off before you do this.

If you are using 'time-delay' fuses and your condenser is 'clean' and you can't find any 'loose connections' - and you continue to have the same problem (blowing fuses) - I would suggest calling a Service Tech.

Note: never replace a fuse with a bigger fuse, i.e. if the fuses in your unit are 40 amp - 'do not' put in 50 amps.

It is possible that the fuse(s) you are using are not the 'right size' but that would have to be determined by a Service Tech and actually - is not a strong possibility, although certaintly possible.

hope this helps

Aug 14, 2010 | Bryant Heating & Cooling

1 Answer

Air on heat pump not cool outside unit humming but not kicking on


This could be an inoperative condenser fan.System will kick off on high pressure without proper air flow.The hum indicates voltage is present. Providing the fan motor is not locked up and will spin,Check your run capacitor which helps boost the motor voltage initially and will get it turning.If the cap is good,you may be faced with motor replacement....good luck

Aug 19, 2009 | Carrier 38CKC042 Air Conditioner

2 Answers

Bryant air condition fan outside not coming on


Check breaker for outside unit Also check to see if you ahve afloat switch on the inside air handler. Located under or in front of unit. It may be full of water and tripped. Blow out drain if tripped.

Jun 15, 2009 | Ruud UBHC Air Conditioner

1 Answer

Bryant central air unit fan doesn't stop.


This is a condenser fan and as long as the A/c unit is in cool mode, this fan will run. The only time it should shut off is when temperature setting is satified and the unit shuts off.

Jun 03, 2009 | Heating & Cooling

1 Answer

Condenser unit will not come on


Replace the starter capacitor.

Apr 27, 2009 | Bryant Heating & Cooling

1 Answer

Fan


Ifs its a small humming sound,then its the contactor pulling in. But if it a loud humming sound then its the compressor kicking in. and the fans not, try to take something long and turn the blades on the fan, if it takes off and run then your capacitor is shot or swollen at the top,which was cause by power surge. Take-off and replace with the same mfd. writings ,on the outside of can. Also check for blown fuses or tripped breaker . the fuses should be in the disconnect box on the wall, or the breaker in the breaker box.. Older house has fuses instead of a breaker box!

Sep 01, 2008 | Bryant Heating & Cooling

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