Our 01 has what I think is the original cci controls pre tell 21 mn 7770 propane detector. I gather they are out of business. I'm looking for a drop in replacement (size wise that is.) Does anyone know of unit with the same opening size?
Look on Amazon for a MTI 30-442 LPG detector; comes in brown or white.
Joan is a better source than I am, but this is the one I just placed in our 2003 RB, it was a direct fit. I, too, was replacing the original.
PANGAEA RV Propane Gas Alarm, 12V, Digital LP Gas Detector for Trailer, Motorhome, Motorcoach, 85dB Loud Alarm (Flush Mount - Black)
Jason