Replacement AC fan motor very weak.
Short version: I just replaced a failed AC fan motor. Now the fan actually works BUT it runs at around 20% of the previous speed and blows air very weekly. Also, when I set the fan to auto instead of ...
Forum Discussion
Thanks for all the advice so far despite my sporadic updates. The cost is at the storage lot across town so I can only work a little bit at a time before work.
This morning I was able to see the direction of rotation and it looks like the squirrel cage is spinning the wrong way. It's possible that it's not running slowly and I just assumed it was because it's much quieter and barely putting out any air. In my mind that leaves two possibilities.
1. Dometic makes two motors that are identical except their rotation direction and I got the wrong part, which seems absurd. I think the new motor has the direction of rotation labeled so I'll double check that tomorrow, just in case.
Or 2. I almost definitely screwed up the wiring, even though it seemed so simple. I guess there's no such thing as idiot proof.
Someone mentioned that swapping leads to the run and start capacitors could make it spin backwards but as far as I can tell, there's only one capacitor up there. It's got three poles Herm, Fan and C. The motor had two wires to the cap. Brown to fan,and white to C (with all the other white wires). It's possible that in the heat and beating sun I swapped those, I guess but I thought I double checked. Would swapping the white C wire and the brown fan wire cause it to run reverse? At this point I don't care if the colors don't match up, I just want it to work. All the other wires (yellow, black, and red which I believe are the three fan speeds) routed to a 2 row by 3 column plug where they combine with a white, a blue and a yellow-green stripe, which plugs into a metal box which I assume is the control board. Is it even possible to wire the control board so that high and low both work in the same but wrong direction?
This morning I was able to see the direction of rotation and it looks like the squirrel cage is spinning the wrong way. It's possible that it's not running slowly and I just assumed it was because it's much quieter and barely putting out any air. In my mind that leaves two possibilities.
1. Dometic makes two motors that are identical except their rotation direction and I got the wrong part, which seems absurd. I think the new motor has the direction of rotation labeled so I'll double check that tomorrow, just in case.
Or 2. I almost definitely screwed up the wiring, even though it seemed so simple. I guess there's no such thing as idiot proof.
Someone mentioned that swapping leads to the run and start capacitors could make it spin backwards but as far as I can tell, there's only one capacitor up there. It's got three poles Herm, Fan and C. The motor had two wires to the cap. Brown to fan,and white to C (with all the other white wires). It's possible that in the heat and beating sun I swapped those, I guess but I thought I double checked. Would swapping the white C wire and the brown fan wire cause it to run reverse? At this point I don't care if the colors don't match up, I just want it to work. All the other wires (yellow, black, and red which I believe are the three fan speeds) routed to a 2 row by 3 column plug where they combine with a white, a blue and a yellow-green stripe, which plugs into a metal box which I assume is the control board. Is it even possible to wire the control board so that high and low both work in the same but wrong direction?
