I have a 3 ton Waterfurnace Envision split system that the installation was completed in the fall of 2013. It has performed great and has been saving me a lot compared to the old fuel oil system it replaced. I am very happy with the system and the results it has provided so far. I have been a lurker on this forum since before making the decision to have this system installed. Last night I woke up at 2am to a cold house and when I went downstairs to check the system the low pressure/compressor status light was flashing red. I powered down the system and powered back up and it started and has been operating seemingly fine since; it has brought the house back up to temp and maintained the setting. I looked in the owners manual and it is vague on what to do in this situation. Should I not worry about this if the unit continues to operate seemingly normally? I am basically wondering at what point do I contact the installer and should I be concerned about what happened; or does this happened once in a while? It had been in operation for over a year without a reset; is it like a computer where it needs to be fully shut or powered down once in a while? Thanks for the assistance.