Rank: Member
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Joined: 8/28/2008(UTC)
Posts: 22
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Hi, I recently replaced an Overload Relay Kit ( 12002782), the part was redesigned and consists of two separate devices instead of looking like the original that was pictured. I also purchased a Run Capacitor ( 65889-4) just in case. Upon installing the parts, I've notice that the original 'Run Capacitor' was still working but I went ahead and replaced it with the new one just in case. After a short while I also realized that whenever my compressor cycles on/off, it makes a noticeable soft 'knock' noise, the sound wasn't all that bad but it's just something that I'm not used to. It is somewhat of a nuisance during late nights because ambient noise is much less. So today, I went ahead and switched the 'old' capacitor back on and the sound was somewhat absent when the compressor cycles. Now my fridge runs much longer, I'm not sure if it needs time to catch up to its regular cycle (14-15 minute intervals of on/off). The original capacitor is different from the one I ordered, maybe the original has been redesigned like the overload relay kit did. Below are some specs that I copied off from both capacitors. Should I be using the new one in accordance with the newer 'Relay Kit' or I'll be okay with with the old one? Original Part: ( pic of original part - evenly squared shape) JSU18X156AQA 180VAC 15uF 70c 10000AFC 50/60Hz Made in USA New Part ordered: ( 65889-4)(more rectangular shaped) NSK85212 -40/75c 15uF +10/-5% 220VAC 50/60Hz 1PH 10000AFC 275VAC Made in Japan So the ultimate question is; does a capacitor affect how the compressor operates? Do certain amperage here makes a difference thus triggering compressor torque and making the knock sound?
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Rank: Member
Groups: Registered
Joined: 8/28/2008(UTC)
Posts: 22
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...the fridge is now back to its normal cycling intervals of 13-15 minutes between on/off - and varies up to 15-16 minutes. The compressor kicks in and out and still gives a slight audible knock; I don't know, maybe this other capacitor (the new one) had "broken-in" and made the mark.
I just felt the fresh food section and the fridge is VERY cold compared to when it was running with the new capacitor in the past two weeks before the switch. I don't know what the average lifespan of a capacitor is but I do hope that the old one will hold up longer.
The fridge (Maytag PTB1949GRW) was purchased back in March of 2002, since then it's been very reliable until the 'overload relay' device started clicking and gave up recently on August 28, 2008. But all is well now and colder than ever.
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Rank: Advanced Member
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Joined: 9/10/2007(UTC)
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Was thanked: 2 time(s) in 2 post(s)
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The start device virtually shorts the run capacitor at startup, so the effect is minimal. The run capacitor gives the compressor more running torque by feeding the start winding some phase shifted current.
If you fail to add the run capacitor, it will lead to compressor failure as the compressor will run less efficiently.
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