I have an eEcobee3 I've been trying to get working with my HVAC. The HVAC is a heat pump, with the air handler in the attic. The current thermostat is a RiteTemp 6025. It's currently wired up at the thermostat the way the RiteTemp instructions say (the C wire is present and hooked up), except that the W wire from the air handler is connected to the W2 terminal on the thermostat, and the Y wire is interrupted by a float switch for the drip pan. The RiteTemp operates as expected: cool air when the temperature goes above the threshold, warm air when the temperature drops below the threshold.
(I understand the Y wire triggers the condenser, so presumably the float interrupts the yellow connection to kill the HVAC if the pan drain gets clogged and overflows.)
However, when I hook up the Ecobee following the Ecobee instructions, I get hot air when I should be getting cool. I'm wondering if the fact that the W wire is connected to W1 at the air handler and W2 at the thermostat is messing things up. But the RiteTemp works as it should, so...? Is there a reason the white wire would run from W1 at the air handler to W2 at the thermostat?