A/C started making rough noises today. What should I check?

One thing about this Forum is that if I do make a Boo-Boo and post something that isn't right there will be several that will correct me in a civil manner.
I depend on "Open Roads" for the proper information.
Marvin
PS, I know it wasn't the OP's problem but Dirt Dobers and bird nest can cause problems. :)

Dave H M wrote:
Did the thing start rumbling after you used in the spot you are in for a while.

Or did rumble on the first start up after not being used for some time?

It just happened overnight while in use. I woke up and was drinking my coffee when all of the sudden I was wondering what sounded like a very loud motorcycle was doing so close to my RV. I went outside and realized it the AC unit doing it's best imitation of a mean Harley. Definitely wasn't a good feeling! :) Luckily I have Amazon Prime though and the fan motor was relatively cheap on there. I got my replacement with free two day shipping and I was beating the heat again within just a few days.

Did the thing start rumbling after you used in the spot you are in for a while.

Or did rumble on the first start up after not being used for some time?

This forum has saved me untold time, money and headaches. Also provided friends, some of whom I've met in person. So yes, stick around.

Glad to hear it worked out. These forums are priceless for sure.

Just wanted to chime and say thanks so much to everyone who helped me out in this thread. You guys saved me so much money and stress. The repair person I was speaking with estimated it would be $350 for the part plus labor. I got the motor for just $110 with tax and had it installed in about an hour. Both HVAC specialists I spoke to also advised me to just replace the entire AC unit rather than just the motor, and they both estimated it would be $1000+ including labor for a whole new unit. I am very grateful for everyone's input and I think I'll stick around the boards awhile! I really didn't expect such a wonderful community. Take care everyone and have a good weekend!

Reading Joe ^^^ I think I might have cleaned the motor shaft between Fan and Motor, then slid Fan toward Motor to get clearance to get Motor, Squirrel Cage, and Fan out. Reversed the process to reassemble.

Joe's idea of getting measurements first is a very good one.

FYI, at least on our Coleman Mach 15, I didn't have to relocate any major components like the Condenser to R&R the Motor.

If you haven't already taken the old one out, it's not too hard but be careful and don't bend the copper lines too much when you swing the condenser out. Only swing it out enough to remove the motor.

All you have to do is remover the 4 screw holding the fan motor mounting plate to the evaporator housing. Remove the 2 screw holding the "L" bracket to the tray at the back of the motor. These 2 are short screws and need to go back in the same location.

Then remove the screws holding the condenser coil and fan shroud. There are 4 very short screws that hold the shroud to the bottom tray. Sometimes they are hidden with rust and gunk. Yours seems to be clean.

When you re-assemble, those short screw need to go back in the same places. If you get a longer screw in there it could hit the rubber roofing.

You can then swing the condenser outward, away from the fan blade and you should be able to take the motor out and down to a bench to swap the squirrel cage, fan, L bracket, and mounting panel.

Measure the distance of the fan and squirrel cage from the motor housing. I use a strip of emory cloth and clean the shafts up, even though the motor is bad, that way I don't damage the fan or squirrel cage getting them off the shafts. Clean the fan and squirrel cage while there off. It's easier. When re-assembling, put the fan and squirrel cage back on the motor shafts at about the same distance that you measured before taking them off.

Take pictures how it's assembled and of the wiring and you shouldn't have a problem putting it back.

I've found that the start caps terminals on some capacitors are soldered on a wire sticking out of the plastic housing. Better hold those with needle nose pliers while you pull the wire terminals off. It doesn't matter which of the brown wires go on which terminal. Cut the wire crimp-on's off. I use standard screw on wire nuts to re-connect the wires, just make sure they are tight.

re-assemble and you're done.

Good luck,

That's it. When I clicked the link above, it came up and Amazon informed me that I'd already purchased that item. Your old motor may not be labeled D1092 but the Amazon motor's the right replacement.

Direct fit, easy swap. Use sandpaper or emery cloth on the end of the shaft beyond the fan blade. Add a little penetrant, WD40 will do it, to help slide the fan off. When I got ours out, I found the inside blower (squirrel cage) was very dirty. There's a notch in one of its fins to give access to the set screw if your Allen Wrench is long enough.

Open the A/C Breaker before you go in there, and short across the Capacitor connected to the Brown wires. IIRC, the new motor already has the push-on terminals for the Capacitor on those two Brown wires. I used crimp butt connectors, Blue, I believe, on the other ones.

No solder. Crimp or a wire nut only.