Flap won’t retract M20J

[DF's M20J]

1978 M20J is down for annual inspection and up on jacks. Cycled flaps down won’t retract up CB not popped. Seems froze

what's next?

[kommers]

typically, the limit switches or the motor itself. I had this issue for about two years in my 1978, my mechanic kept cleaning the switches, but after a few flights, flaps would not retract or extend, or both. Finally, he replaced the flap motor and this was the solution

[ArtVandelay]

Limit switches or flap switch itself. A few minutes with a multimeter will tell you which.

[Yetti]

Contact cleaner on the limit switches.   Wash them out and exercise them.

[EricJ]

Most likely a stuck/dirty or inop limit switch.   Just takes removing a small belly panel to get at them.   Spraying contact cleaner on them might fix it, else potentially a readjustment or replacement of the switch.

 

[DF's M20J]

Thanks to all who offered me advise. About 60 min after the problem and lunch reached in turned on the master flipped the flap switch and up they retracted.

I’ll have the contacts cleaned too. Thanks

[bradp]

Clean the contacts too.  Then make sure the problem doesn’t reproduce itself.  

[N201MKTurbo]

You don't see these on Ebay very often.

https://www.ebay.com/itm/223710103485

Super deal brand new!

[kajo]

I had this issue while flying with my CFI about 3 years ago.  The flap is stuck at 30 degree position. We flew another pattern, landed, and while taxing toggled the circuit breaker and it started to work again. Now issues after that so far (about 250 hours).  We did not do any kind of repairs.