When we turn on our central A/C the fan comes on & the compressor comes on for about 10 seconds & quits
We have an older Ruud Central A/C unit. I have replaced the capacitor & it still does the same thing . Fan goes on , Compressor starts( the lights dim when it does) it runs for about 5-10 seconds & the compressor quits, Fan keeps going . Thank you in advance for any hints : )
Re: When we turn on our central A/C the fan comes on &...
Sounds like a compressor problem to me.Have you tried a hard start kit?This increases the starting torque.Put an amprobe around the common wire to the compressor and see the amperage draw is on start up.It sounds to me the compressor is cutting off on the internal overload.This is located inside the compressor on the common winding.There shoud be a tag on the condenser housing that gives you the info on the unit.Look for:FLA-full load amps,which is normal running amps and LRA-locked rotor amps,which tells you if the compressor is locked(bad).This will be a high number.If this is the case the compressor will have to be replaced.If it is an older A/C,I'd replace the condensing unit. And if possible, replace the indoor unit also.You'll be pleased with the results.Hope this helps. Gregg
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u may just have bad capacitor see if it looks swelled up if so theres ur problem if not u may have lost a leg of power or u may have a locked up compressor but it sounds like u have a bad capacitor or a bad contactor
I have a new 13 seer rheem or ruud same thing. I can not here it run. Uou must have a bad compressor. Ruud put schroll compressor in and when they start to go out they will drive you nuts they are so loud. Get it changed before your warranty runs out. Ruud will change your compressor if it to noisy. No problem. Russ
You,ll need to open the furnace and observe the led lights on the comtrol board the is a chart attaced to cover. If it is in lock out mode the fan runs. To reset turn off at tstat.the turn the power on at the furnace, set tsat up, observe furnace. First you should hear a small fan then the glow of the ignitor then the opening of the gas valve and flames 10-30 seconds then the big fan.
Newer High efficiency A/C's are not compatible with the older systems for many reasons. They use a different refrigerant, have a different oil in the system for lubrication and they operate at higher pressures than the older systems using refrigerant 22 which is being phased out. It is standard procedure to replace the entire system when upgrading.
Check your wiring between the contactor and compressor for a short to ground, or check the compressor windings for short to ground.
With the Tstat off, the contactor should be open so the only way for the compressor to be trying to do anything is if the 110 volts from the unbroken side are traveling through the compressor to ground. Since 110v is not enough to run it, the overload is kicking it out, cooling off, and repeating the cycle. When you kick on the Tstat, the contactor is supplying voltage directly to ground without going through the resistence of the compressor windings and kicking the breaker.
Post back and let me know what you find.