Here's the manual:
http://www.intermatic.com/~/media/Inter ... 1000Thanks ME%20Series/P1353ME.ashx
On page 31: Mode 3:
Aux #1 & #3 will blink indicating the control has activated these two circuits due to a freeze condition. To override the circuits during a freeze condition, simply press and release each of the corresponding ON/OFF keys. This will override the freeze control and turn the devices OFF. The override will only last for one hour, so if the freeze condition still exists after one hour, circuits #1 & #3 will come back on.
The freeze protection stays enabled until the outside air temperature exceeds the programmed freeze temperature for more than one minute.
IMPORTANT NOTE
The freeze protection feature will not work unless you have installed the freeze sensor probe. Refer to page six of this manual for ordering and installation instructions, and step #10 for freeze programming instructions.
So as long as you've installed the freeze sensor probe both 1 and 3 will come on and do what you've requested.