Help Identifying Capacitors.

Other Hardware General Electronics
1

I have an electric fireplace that has a problem getting the fan going on start up. If I nudge it with my finger it takes off. I assume this is a bad capacitor. I found only 3 on the board.

2 are metalized film type: (these are near a triac)

CB22
630V22nJ

CBB28
1KV103K

One is a cubic rectangular shape (Don't know the type) (across the main power coming in)
MPV/MKP.DEFU
275VAC .1uf

Is the 275VAC one for starting the fan?

Also I am having a hard time identifying the CBB ones.
Does 22nj mean 22 nF?? or .022uF??
Does 103K mean 10000pF or 10uF??

Trying to order from one vendor. I can't find anything like these in mouser and the Chinese on Ebay seem to have the game rigged by making sure you have to order each component from a different vendor thus paying more shipping.

If someone could possibly tell me which one helps the fan start and a suitable replacement/supplier I would appreciate it.

Thank You

2

Unless there is a capacitor actually fitted on the motor, or a capacitor with one of its leads connected to a terminal on the motor and to nothing else, then it's unlikely that the motor uses a capacitor for starting. The fan is probably a single-phase induction motor with shaded poles for starting (there are generally copper hoops around one part of each pole). The starting torque is much lower than the running torque for these motors. To get it working again, you probably need to dismantle the motor, clean it, lightly lubricate the bearings, and re-assemble it. I once had to rotate the square-section housing of a brand new motor by 90 degrees relative to the ends in order to get the friction sufficiently low for it to start.

3

Oil the bearings. Both ends of the shaft - may need some disassembly.

So called "no maintenance" bearings are a joke, can seize in less than a year of operation.

4

I agree with the previous contributors. Fans use self-starting induction motors, not capacitor start.

Forget about the capacitors - it's almost certainly the bearings that have got tight.

5

I greased the bearing with a product called super lube last year. It only lasts a week but the lube seems pretty decent. The bearings are just a piece of plastic. Maybe it's time for the trash.

6

The bearing should be a sintered bronze (speckled orange metal) insert inside the plastic.

Use sewing machine oil.

7

I hate to say anyone wrong but the 275 volt cap is used on bower fans like you find in window AC and could be used on your motor too

8

For those capacitors the first section is the voltage, 630V for the first and 1kV for the second

For the second part, the first one is 22nF while the second is 10*103pF = 10,000pF = 10nF

The last letter denotes the tolerance values. These are the most standard tolerance values found on capacitors.

  • A = +- 0.05% or +- 0.05pF
  • B = +- 0.1% or +-0.1pF
  • C = +- 0.25% or +-0.25pF
  • D = +- 0.5% or +-0.5pF
  • F = +- 1%
  • G = +- 2%
  • J = +- 5%
  • K = +- 10%
  • M = +- 20% -you often see this one on electrolytics as [M], (M) or M inside a square.