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RUDD A/C not running, only fan

I had a RUDD unit installed last year at a condo at the beach. We arrived tonight and only the fan is running. When I go to look at unit outside, it isn't running. We've looked at the fuse box and thought of any way it's not getting power but can't figure it out. I'm sure the last time it was turned on because we do not rent the unit and were here last month but it was still cold and we didn't use it. HELP...we are burning up!
Thanks!

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AC Unit humm but fan dosnt tun on unit. I turn the power on and off and can hear it click. Help???

Posted on Jul 05, 2008

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Ok it unit is a central I'm suspecting a voltage transformer is defective you see these units need 24v to turn on certain components but if your air handler turns on, your getting 24v to the fan relay, the problem would be elsewhere. if your handy with a volt meter open the thermostat(if applicable) put the meter on ac volts and measure to see if there's 24v between the R and Y terminals

if so your cooling contactor is defective. (If you get 24 v and unit outside dosen't turn on) if there isn't some fuse on the air handler control board blew out.

you can e-mail me @ hvac.tech7872pr@gmail.com if you need more info

Posted on Jun 16, 2008

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It may be your contactor.

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Two possible problems here.
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2. you have a bad run capacitor on that fan. avg cost $5.00 - $35.00 plus installation
In my opinion if you're handy and safe with electicity save some money, if not have it done.
check out grainger.com for the parts they're very reasonable. for the fan you'll need to get specs from the defective unit like amp. voltage rpm. its all on the unit itself. for the run capacitor you'll need the same. all the info u need is on the parts. search the site for run capacitor or condenser fan motor.
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Turn the thermostat as low as it will go and have someone stand out side, they should here the condensor fan and compressor come on at the same time. They are two distinctive sounds so you should
be able to tell if the compressor is running.

If nothing happens and you are skilled with electrical
you can turn power off and remove the electrical
cover to the outside unit. Restore power and carefully
push in the contactor, if the fan and compressor
starts you have a thermostat or low voltage problem.

If just the outdoor fan runs on any attempt, more than likely you need a new capacitor.

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