Heater

We thought the heater was about to die a horrible death this afternoon, leaving us in the cold.  Someone was able to get out to fix it, but before they did, we were considering evacuation plans for fleeing to a hotel.  Does anyone think we might need to continue work on those plans, to be on the safe side?  Because the heater has been acting up for weeks, and we're not sure that what those people did will do anything besides temporarily fix it.