If you have a Dometic Penguin 13.5 or 15K A/C and use the Auto function when running in A/C mode and wonder why the HI speed fan never kicks in here is why.
In the AUTO COOL mode the fan will automatically select the speed depending upon the difference between the temperature SET-POINT and the room temperature.
When that difference is:
- 8 degrees or more - The fan will operate on HIGH
- 4 to 8 degrees - The fan will operate on MED
- 4 degrees or below - The fan will operate on LOW
But, if you want to change this is simple 2 wire swap. But, be aware that you will be working with 120 volts. So, make sure that you have DROPPED shore power before you attempt this.
If you remove the A/C shroud you will find a cover for the wiring to the circuit board. This cover is held on with 2 machine screws.
Again make sure you DO NOT have shore power going to the coach as T1 and T3 are live wires!!!!! Now swap T1 (black wire) and T3 (red wire) and your done.