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Anonymous Posted on Aug 19, 2013

Handler runs fine but the outside unit, it will kick the fan on for a sec and then shuts off. It does it over and over. sounds like something isn't turning on? what's going on?

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Robert Slack

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  • Expert 138 Answers
  • Posted on Aug 24, 2013
Robert Slack
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Sounds like a bad relay on the fan , if the compressor is trying to start and stopping that kick the fan on and off. That could be due to a low charge if the unit is not cooling properly.

If the unit is cooling properly it is probably a bad relay or contactor on the fan motor.

Other possibility is the fan motor is over heating for one reason or another and if its thermally protected it will automatically shutdown. If thats the case then you need a new motor.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_54ae41aaaffbab00

5 Related Answers

fixr1st

  • 49 Answers
  • Posted on Jun 01, 2008

SOURCE: blower fan keeps shutting on/off,

Try putting your fan in the on not auto position and see if your outdoor condensing unit cycles on and off. If it does you might have a defective time delay relay to blower. If not your contactor might be stuck or your thermostat could be defective.

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Anonymous

  • 2 Answers
  • Posted on Jan 12, 2009

SOURCE: axu heat and outside blower fan run all the time

I can tell you exaclty whats wrong . and it sounds like multipart problems. you have an old RUUD heat pump and its reversing vavle is stuck. without that valve opening it will contantly try to run in refrigerant mode to make heat. and here its 26 degrees, het pumps are only made to be effiient in over 34 degrees and that why your electric heaters in the blower section in an in a closit of unit
continously running up you eectric bill big time. cuses for the reversing valve to stick are sitting along time when it was low on refrigernt. or ust plain shut depending on its age. that cicking is the relay trying to open or close the reversing valve swict to make pressure again. any local guy an fix that one. theyre are kits called hard start kits that they hook up to them that shoot an extra zap of jiuse in it to try to free it up if its not totally lockd up being though that you still hear the relays pulling in and out thats good you may have just caught it in time.

now here is a quick test and possible cure but only if you what your doing turn both units off take off the top cover of the old rudd and get a small hammer not a sledgehammer and rap and tap all around the reversing valve. it will be a cylindrical tube black usually have sets of copper or brass tubings going in the 2 sides of this so dont hit itthat hard it gets dents it and is ruined. look for oil spots which uually means the refrigerant leaked out , and its seized up for good. they try spinning around the big out door fan door fan some. you may have to rock it back and forth Till it braks lose but dont put super human efort int it,

than put it all bak together making sure you connected wires back up right. go in and have you wife eithe watch it or you do it and switch the breker on and off about 8 times to trying to get the cnnectors switches to stay in and if your brave take a well insulated screw driver and hold them in for 2-4 miuntes to force it to work. if that doesnt do it call your local repairman and tell him you need a hard startkit only much safer, the cost about 40$ but you labor will be high if he is sent alone so may you can help im out and lessen your bill if the valve cant be made to work again. you may want start looking for prices with that model and serial number and d shut that electric heater off some one to replace it . I hope I helped you out some no charge ( I dont have my Pay Pal acct. set up yet ) good luck tom.

pierre1811

Perry Putnam

  • 144 Answers
  • Posted on Jan 22, 2009

SOURCE: Heat pump is humming loud>

When the heat is not on. Go to the T-stat and turn the fan to the on position. With the blower now running is it making the noise? If so you probably either have something in there such as the filter that was mentioned, a piece of paper etc. or one or more of the blades on the blower wheel is vibrating. Don't let the condition persist w/o having it checked out or you may turn a simple fix into a costly one.

Anonymous

  • 478 Answers
  • Posted on Mar 12, 2009

SOURCE: Amana 1 ton Residential AC / Outside unit comes on for a sec

open the service panel to check for control voltage of 24volts when tstat calling, The contactor should be pulled in, if contactor is down,and contacts appear to be clean, and the unit is still not running, it is a bad compressor. to test this unplug the black wire from the compressoror at contactor,w/ power off! Turn on power if fan works normally it's a bad compressor. However if you see a swollen split cap(5 wires to a soup can looking w/ the terminal C,F,and Comp), switch it first and start at square one.
You also need to consider the high pressure switch if its cycling on off on off.

Anonymous

  • 46 Answers
  • Posted on May 25, 2009

SOURCE: OUTSIDE UNIT OPERATES BUT FAN DOESN'T TURN AND UNIT DOESN'T COOL.

the motor could just be locked in place from sitting...take a stick or something and try to see if it spins be sure of rotation! you can also give it a little nudge while it is on and it will take off! if this happens then you have a bad start compacitor but no there are no fuses that only protect the motor!

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I have an older trane twe030c140b0air handler and it was workingq fine then today froze. Fan in unit will not run. Sparks from conteoller. Is that the correct name? Unit is 208 thanks

Turn power off to air handler. Jump red and green inside the machine. Turn power on. If fan runs then the problem is likely outside of the machine, that being tstat or tstat wire.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

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If the fan blows when forcing it on with the thermostat but not in automatic, check the fan control circuit in the air handler. Danger: high voltage, beware! There should be a system wiring diagram inside the air handler somewhere.
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