Originally Posted by cosmatics
I've checked voltage across the different ports, as well as continuity. Should the heating/cooling relays remain open with no power? I would think they would open up. Hopefully its a function parameter setting. I set F1 to 5, F2 to 1, F3 to 3, F4 to 0.
I believe you should get an open circuit between 7&8 and 5&6, when the unit is powered off. Disconnect your receptacle wiring and check. Your parameters look good. When the probe measures >= F1 + F2 AND it's been F3 minutes since the last ON time, 7&8 should have continuity until the temperature drops to F1. When the probe measures <= F1-F2, 5&6 should have continuity until the temperature rises to F1.
The cooling & heating lights are steady in cooling & heating mode. The cooling light blinks while the delay-on is timing out.
If this doesn't work for you then you may have a stuck relay. Did you happen to mis-wire the unit at any time?