To clear all programs so you can operate the thermostat manually, turn it off, then press the MODE and ZONE buttons at the same time and the display should show IniT and both of your zones. Release both buttons and then press the ON/OFF button to exit the system setup. We run ours strictly in manual mode, do not set the time feature or anything else and have no problems. We adjust the temps before bedtime and again when we get up.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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