Could you please make a test for me?

Inside the test code part, put a Serout command to monitor the two values MTemp and setpoint

[code]
MTtemp >>4
if MTtemp <= setpoint then
high heater
else
low heater
endif
Serout TX, T9600,[dec MTemp, dec setpoint] 'Please put at the preffered place on your LCD
[code]

Ioannis