I have two HAI Omnistat RC1000 thermostats that are both just under 1 year old, and both are behaving as follows:
system type is set to heat pump (NOT dual fuel)
stage settings are 2 stage heat and 1 stage cool
Hold is set to on (defeats EEC settings)
Mode is set to heat
When I raise the heat setpoint 3 degrees or more above the current temperature, only the first stage heat indicator comes on. The 2nd stage heat indicator is not on, and I have verified the W2 output is at 0V. (The 1st stage heat indicator is on, and the Y1 output is correctly at 24V)
If I change the Mode to EM Heat, then the second stage heat indicator comes on, and I have verified the W2 output is at 24V. (The 1st stage heat indicator is off, and the Y1 output is correctly at 0V)
Since both thermostats are behaving the same way, perhaps I have overlooked a setting somewhere, but I have scrubbed through everything and can't find anything wrong.
system type is set to heat pump (NOT dual fuel)
stage settings are 2 stage heat and 1 stage cool
Hold is set to on (defeats EEC settings)
Mode is set to heat
When I raise the heat setpoint 3 degrees or more above the current temperature, only the first stage heat indicator comes on. The 2nd stage heat indicator is not on, and I have verified the W2 output is at 0V. (The 1st stage heat indicator is on, and the Y1 output is correctly at 24V)
If I change the Mode to EM Heat, then the second stage heat indicator comes on, and I have verified the W2 output is at 24V. (The 1st stage heat indicator is off, and the Y1 output is correctly at 0V)
Since both thermostats are behaving the same way, perhaps I have overlooked a setting somewhere, but I have scrubbed through everything and can't find anything wrong.