Dometic Microair U-Board NOS

Circuit board for all Dometic self-contained air conditioners, split systems, air handlers and Radomes built in the last 10+ years. 

Board works with the following 8-pin thermostat displays: Passport I/O, Cap Touch, Elite II and Smart Touch.  It also works with QHT, SMXII & SMXIR 6-pin Cruisair displays.

This is new old stock in amazing nearly-new condition.  All boards have been retested.  30 day exchange warranty.  Limited to stock on hand.  Due to slight variations, picture may not be the exact board you receive but it is guaranteed to work.  If any questions, contact us as we are marine AC experts.  

This board does not have network capabilities. Board has a red light to indicate power.  The board has 3 black jumpers located near the telephone jacks. Remove the JP3 jumper if you are using a 10K remote temperature sensor and not a 3K.  The difference between the two sensors is about 50 degrees.  Remove the JP1 jumper if you are using this board on an air handler and it does not have a pump or compressor.  Remove the JP2 jumper to activate a low pressure switch.  Most units only have a high pressure switch.  The high pressure switch must be connected for the board to function.  

Board has three telephone-type jacks.  MA display is for 8-pin Marine Air displays.  CA display is for 6-pin Cruisair displays.  Only one display can be connected.  The third jack is for a remote temperature sensor.  If you have a 4-pin 3K temp sensor, leave the JP5 jumper in place.  If you have a 6-pin 10K temp sensor, remove the JP5 jumper.  

Board measures 5.25" x 4.25".

This is a green board and will replace some Microair blue boards.  Current Dometic part number is 223100510.  This board is the replacement for 223100502, 223100504, 223100508, 223100511, 520126233, 501-09-BL, 400-IO, ASY-400-X02, 341945, 340590, 340690, 341578, 341678, 340959, 340969, 4220020, PCB-520-00C, PCB-520-00D, PCB-520-00E, PCB-520-00F, PCB-520-00G, PCB-520-00H, PCB-520-00K, PCB-520-00L, PCB-520-0L2 PCB-520-xxx, PCB-372, PCB-400 among others.  Contact us if your board is not on this list as this board also replaces some Passport boards that have 4 telephone-type jacks.