Fan Help

[pyton]

I want my fan for my lights to turn on and off every 15 minutes.

If the tank gets too hot I want the fans to turn on (not likely this will happen but it could over the summer)

If the tank temp goes to .1 above what the heater is set to turn off I want the fan off.

This is what I came up with but not sure it is what I need.

Fallback OFF
OSC 015:00/015:00/000:00 Then ON
If Temp > 78.5 Then ON
If Temp < 77.9 Then OFF


My main focus is to keep the lights cool without cooling that tank down so much that the heater is running 24 / 7.

How would you change this? Is there something better.

This is just a temp solution right now until I get my dedicated fans mounted on my lights.

Thanks

[swearint]

If I understand what you want, that will not produce the desired results. If the tank is above 78.5, but the OSC happens to be in the OFF phase of the cycle, the fans will turn off as soon as temp equals 78.5. So it won't cool down to 77.8 as desired.

*EDIT*
Looking at this more carefully, it will behave such that at a Temp above 78.5 the fans will be on. Between a Temp of 78.5 and 77.9, the fans will cycle. At a Temp below 77.9, the fans will stay off.

Todd