I'm trying to repair a 14-year old ceiling fan that runs slow. Capacitors sound like a common problem. What I'm not sure is which replacement capacitor is best.
Here's photos of this fan's capacitor and wiring in its control box.
Using a digital multimeter to test capacitance between the red wire and the gray wire across from it on the capacitor, I got a reading of 0.430uF. I did that test by sticking one multimeter probe-needle into the gray wires' wirenut where it was able to contact their aluminum, and sticking the other probe-needle into the red wire's terminal in the plastic 9-wire connector. Given the capacitor's labor showing gray-to-red should have 3.5uF, I am thinking this supports the idea that the fan runs slow because the capacitor has gone bad. I am new to working with capacitors (done much more electrician than electronics DIY) so I might be reading this wrong, as I understand the capacitor could simply be 'under charged'. I disconnected the fan from its power source 1-2 days ago.
If it does make sense to replace the capacitor, my question is, what to replace it with? I found the two options below and neither is exactly a match - I can't seem to find an exact match.
Both options have the same number and colors of wires, which is what Lowe's tech support claims is all that matters. Option A from Lowe's has the first voltage at 350V vs the original 300V, and its capacitance is higher at 4.5uF vs 3.5uF and 6uF vs 5uF. Option B from a less reputable dealer is a closer match, with the only difference between 250V vs original 300V on one line. Am I right in thinking option B is the way to go for this replacement, since capacitance should match exactly, and having a slightly lower voltage is not a big deal given it is >240V anyway for this fan which is on a 120V circuit?
Any general feedback about this repair is also welcome. I am wavering on whether to just get a new fan. $12 in replacement parts seems better than $120 in new fan, and I'd like to reduce waste and learn skills when repair is reasonable.