I have just moved house, it has a Lennox Elite CB30M 65 1P heat pump. There are two circuit breakers on the front, the left one is off and the right one is on. We are trying to find the correct settings for A/C in the summer and Heat in the winter. Anyone have any ideas?

Circuit breaker should be a double pole and both should be on. Are you sure you mean circuit breaker?

Thank you for your reply. Yes they are definitely two Square D circuit breakers mounted near the top left of the appliance, they have no markings and no indication as to what they do, I tried looking at a schematic but it seemed to be generic to lots of Lennox models and I couldn't figure out the function of the two that I have. As it is a heat pump, could one of them be for the auxiliary heater perhaps? I don't know I am just guessing. At the moment the unit is working (ie blowing cold air) with the left one on and right one off and yes that is the reverse of what I said in my original post - I got it wrong last time.

Any clue that you can give regarding the function of these two circuit breakers would be appreciated.

I have never seen a heat pump run on 120VAC. Strip heaters draw a lot of current. This could be a safety disconnect as code requires such but not sure as to what the 2 are.

You may find that the main breaker panel has the 240VAC. These could be for the fan and possibly the crankcase heater. Where are you located?

I am in South Austin, Texas

I would go to the Lennox web site and either post the same question of see if they have a chat line. Maybe you can download a PDF manual. GoodLuck.

Thank you, I will try that.

Those breakers are for two different banks of heat strips. Some people like to run 20 kw and others like 45 kw. If you have deep pockets turn both on, otherwise use only 20 kw. The one that's on is probably the main one, so I would mark it. To get really good efficiency unplug W1 and you will only use the heat pump for heat. W1 brings in heat strips when it's not heating fast enough like when the set point is more than 2 degrees than room temp. For example, if you set the heat for 70 degrees and it's 67 degrees the heat strips (emergency heat) will come on for a few minutes until it's 68 or 69 degrees, then they drop out. Heat pumps have at least two stages of heat and sometimes three, as in your case, probably. At least you can wire yours to have three stages where heat strips would come on when W1 (2nd stage) and W2 (3rd stage) are energized in t-stat. Due to your location I cannot see where you would need that much heat to get the house to 68-70 degrees.

Thank you for your reply, that sounds pretty logical to me however I am no sure what you mean about unplugging W1. Could you be a bit more explicit please. What exactly is W1?

W1 is on the thermostat sub base where the wires attach and it is the white wire going into the air handler. If it is temporarily disconnected or a switch is put on it so you can turn it off until needed such as when you have a bad ice or snow storm you will not use heat strips which run up your electric bill. You can wire in a simple toggle switch that will go into a 1/2 " hole on side of unit to do the job. Then the white t-stat wire will come from t-stat into switch and leave switch and go into W1 terminal where it is now. It's really easy to do and will save a lot of money unless you keep the t-stat at the same temp all the time. It's most helpful if you want the temp to drop more than 3 degrees while the family is away or you are using a set back t-stat and do the same.