I have a Cozy wall gas furnace - it looks new. Sometimes it starts and
sometimes it doesn't.
The first thing I did was replace the thermostat with an electronic
one. Same problem.
To get the furnace to start I bang on it - I know it sounds silly, but
it works. Maybe there is a loose wire in the furnace ? Or possiblity
the vibration of the banging is tripping a sensor?
Any direction is appreciated - thanks
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