ingeborgdot Posted June 4, 2011 Share Posted June 4, 2011 When I set my venstar thermostat to 72 it goes to 73 and does not cool any more. At night I have always liked to sleep with it at 71 but it only goes down to 72 even if I set it to 71. What is the issue? Thanks. Link to comment
Michel Kohanim Posted June 5, 2011 Share Posted June 5, 2011 Hello ingeborgdot, What is your heat setpoint? If you are in Auto mode, you cannot have your cool set point be lower than heat set point (by 2 degrees). With kind regards, Michel Link to comment
ingeborgdot Posted June 5, 2011 Author Share Posted June 5, 2011 I am in program mode. I have my heat set at 65 right now. What does the auto mode give me that the program mode does not? Thanks. Link to comment
andyf0 Posted June 5, 2011 Share Posted June 5, 2011 Program mode lets the thermostat operate independently with different settings for 4 different times of day. Auto mode is fixed at the setpoints set, no changing setpoints automatically. I use auto mode and have programs running on the ISY to change the setpoints at different times of the day. Did you change the deadband? It may only be the display that is fooling you. When I watch the Cool Control node on the ISY the A/C will turn off sometimes 30secs before the temperature is updated, Link to comment
ingeborgdot Posted June 5, 2011 Author Share Posted June 5, 2011 I am not sure what deadband is? Link to comment
andyf0 Posted June 5, 2011 Share Posted June 5, 2011 That probably means you didn't change it. The deadband is the number of degrees the temperature has to change in order to have the heat or cool turned on. If your deadband is set to 2 degrees (default) and your cool setpoint is set to 72 degrees then the temperature will have to go to 72+2 degrees before the A/C will turn on. It's the other way for heating. If the heat setpoint is set for 72 degrees then the temperature will have to go to 72-2 degrees before the heater turns on. Link to comment
ingeborgdot Posted June 5, 2011 Author Share Posted June 5, 2011 So, I could go in and change it to 0 or +1. Is this in the manual? I will need to look. Link to comment
andyf0 Posted June 5, 2011 Share Posted June 5, 2011 You can't change it to 0. But I think it was from 1 to 6 degrees. Note. If you set it to 1 degree the A/C will cycle frequently which can cause excess wear on the compressor. Also, since the A/C only runs for short periods it will not be able to remove humidity from the house very effectively. Living in Houston I found that out quite quickly. I use 2 degrees for the deadband and have the cool setpoint at 82 degrees so the house varies from 82 to 84. Link to comment
ingeborgdot Posted June 5, 2011 Author Share Posted June 5, 2011 You keep your house set at 82? Holy cow. I would roast. Link to comment
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