Quote Originally Posted by malc-c View Post
Personally I don't think it's the code - this has been running fine in the development board (see the 4ch thermostat post under the code section), and the PIC seems to be running OK when used on the stripboard as the LEDs indicate the PID routines work when the temperature detected by the probes are increased / decreased. My hunch is that it has to be something with the stripboard, I might try re-soldering the wires as it could be something as simple as a dry joint ?
Uhmm... well I just belled out each wire pin fo pin and it all checks out.