Should you wish to bypass the various scheduling options on the M429 thermostat, follow the following procedures:
Press the OK button twice to activate the main menu.
Use the UP or DOWN buttons to scroll to MODE, then press OK.
Use the UP or DOWN buttons to scroll to MAN. MODE, then press OK.
Set desired temperature and press the OK button.
Use the UP or DOWN buttons to scroll to EXIT, then press OK.
Your thermostat will now maintain the set temperature. (Note: power bumps/losses may reset the thermostat back to a pre-programed schedule.)
NOTE: Using the thermostat in this manner may cause excessive power usage, especially if the space is inadequately insulated and/or the desired temperature is very high.