I've searched a lot and can't quite find what how to solve this one. I installed an ecobee smart thermostat, which didn't work with 5 wire connection so I switched to their PEK module with only 4 wires. With this wiring the heat is working fine, but the cooling doesn't (the compressor doesn't kick in, and the fan is blowing ambient air). Anyhow, I tried to map my wiring and this is what I have. Looks wired to me that the Rc is jumped with the common. Any ideas how to fix it?