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I am a homeowner trying to install a new Tekmar 544 thermostat. I am upgrading from a Maple Chase that is 10-15 yrs old. I found most of the literature I needed online for reconnection, but can't get a display on the new Tekmar. I have searched everywhere online to get troubleshooting for this issue with Tekmar thermostat, but there is none for this issue.
On the previous thermostat I had connections to W (Htg Control), Y (Clg Control), G1 (Fan Control), and RH - 24 V Power (which was jumpered to RC). On the new Tekmar, I connected the existing RH wire to R. And provided a connection from Rh1 to Rc per the wiring diagram. The compressor kicked on outside when I did this. I connected the existing W to W1. The existing Y to Y1, and the existing G1 to G1.
I still have no display. The compressor will start and run as long as Rh1 and Rc have a jumper connection. What am I missing? Any help with the display would help immensely as I am out of ideas. Do I have a faulty temperature sensor? Is there anything I can do except return it and try again?