Brian silk
Regular Contributor
Thanks! The pro 2000 is the programmable. One. There should be a version that is either heat only, or heat and cool. I will try and get you the exact part #. You will use the red + in, and the white switch return to yellow wire in thermostat plug. In order to completely replace the espar thermostat you must solder two resistors in the thermostat plug. They send a run on high reading to the ECU. The new thermostat then just connects red to yellow. I will have to look the resistors up and send you a schematic scan. If the want to still have the option of h/l operation, you can use both thermostats. You simply interrupt the red wire feeding the espar thermostat by going first to the red terminal on the pro 2000 and then output from the white socket to the red-terminal 5 on the Espar thermostat. If the espar thermostat is turned up to high, then the pro will then just interrupt the power supply to the espar thermostat. So it will run in high/ off that way. If you want multi heat mode, you simply turn the pro all the way up and adjust the temp with the espar thermostat. One thermostat must always be full in or they will battle one another. Send me an email to [email protected] and I will send you the resistor schematics pro 2000 is TH2110D1009