I replaced the circuit board (P-RMM electronics) on my Stealth fan. It worked for about five minutes then went completely dead. Is it possible I got a bad repalcement board?

It seems that console's 12V circuit is malfunction.
you have to repair the lower control board

Hello Lisa Gray James,

I had the luxury of having a couple of old Casa Blanca fans in the house when ours went kaput (but the point I will try to make
is quite portable... between MANUFACTURERS.

Typically most wall controlled fans are designed to work over a standard light-switch circuit. the ADDITIONAL functions are accomplish through EACH vendors own proprietary switch-fan interface... (in the Casa Blanca case I am attaching below) they use their "RF" signals from their switch... and the control boards emit audible tone to make the user confident something is working.

I had NOT yet discovered the availability of the replacement unit below... but by swapping the living-room switch with the bedroom switch I was able to prove the trouble to Casa Blanca's 21Z2 control board (inside the fan)

Old style 21Z2: no longer available

Inteli Touch Circuit Board RMM 9901120 or 7801240

is manufacture discontinued (Inteli-Touch & Inteli-Touch II)

but the replacement units (Inteli-Touch 3) will work nicely...
Casa Blanca recommended that BOTH the switch (W32)
and control board should be changed... I complied.

(saved my good W12 switch as a spare)

BUT DO NOT hesitate to call the FAN MAN to discuss your options and needs... it looks like a multi vendor site... and I have also seen them on AMAZON.COM

New Inteli Touch 3 System

you may not have a bad cooling system but a possible bad but small head gasket leak I would have it tested for a head gasket leak.

There are different parts that might became bad and cause your problem like relay contact, starting capacitor, running capacitor. However all these parts are included in one unit the PCB printed circuit board or electronic board? So you need to replace this parts in attached link is also called RMM.

We have here below a link with service manual for the fan at which on the bottom you will find the parts diagram and parts list. You should try to confirm the part code for your model with Casablanca service department before confirmation of order.

Also please note that you will need a little experience with electronics before proceeding with above operation.

http://www.casablancafanrepair.com/HTMLFiles/do_it_yourself/InteliTouchCommonRep/ConversionKit.pdf

I fixed this myself by upgrading to an Advan Touch unit. Details here: http://www.casablancafanrepair.com/HTMLFiles/ do_it_yourself/ComfortTouchCommonRep/CTToItConvert6-12- 07Web/SM_CTToAdvanConvert_P1.htmI purchased the P-RMM CT to AT Converts Comfort-Touch to Advan-Touch upgrade kit from http://www.fanmanlighting.com/shop/pc/viewPrd.asp? idcategory=56&idproduct=966The fan man was helpful and my parts reached me in 2 days, normal shipping!

HI. this is a major control fault here. You may be able to reverse the issue by unplugging the unit for 5 minutes. If the damage to the control board is not severe, this reset will force the control to reboot, and correct the issue. If the reset dose not produce positive results, simply replace the main control board.

If unplugging the unit is not possible, kindly, shut down the appropriate circuit beaker for five minutes.

If digits on control board does not shows up after resetting power you need a new control board(part# 9760013 $174.20).
sensor for this model(part# 4455636 $89.78)

I’m happy to help further over the phone at https://www.6ya.com/expert/vitaliy_f406165329c75ede