1999 American Eagle AC Control Box
Last August I replaced the original Coleman Mach V AC in our 1999 American Eagle with a Coleman Mach 15. It has worked great since then, and the increased cooling is noticeable. But a couple of day...
Forum Discussion
Ranger Smith wrote:
You go on the roof. Remove the outside cover. Towards the front of the unit is the grey box with the evaporator coil in it. You remove the 4 nuts and lift off the gray evaporator cover. The control box is right there. That is how it is with our Coleman units.
Ranger,
On the Coleman Mach 15, that control box is up inside the unit, and is accessible from inside the coach. In fact it's hanging down right now.
When I removed the old Coleman Mach V, I did disconnect the wires from the control box on top of the unit up on the roof. Then I sat the unit aside so I just had a 15" square hole in the roof. AND control wires and a 120 VAC wire that goes off to the side through the roof-ceiling gap.
The !20 vac wire makes its way back to the breaker panel under the bed, and the control wires end up at the thermostat. But somewhere along the line, the control wires change gauge and insulation type before ending up at the thermostat.
And along the way, something else happens to the yellow wire. When I measure the voltage at the thermostat base, I get 12v on the Heater connection, 5.92 v on the compressor connection (yellow wire) and 12 v on the fan connection. This is with the control wires on the AC end hanging loose.
On the back AC thermostat, I get 12 volts across the board.
The control wires also pick up the coach 12v somewhere along the line, since the wires aren't connected at the AC unit end, and the thermostat runs on two AA batteries, so it's not coming from there.
Thanks for your help.
