Hello everyone this is my first post

I have a 54 reg L322 4.4 with timed climet / heater on remote fob, using the remote the burner and fan start then stop after 20 or 30 seconds.
The system worked brillianty for the first part of winter then stopped even when set on the timers,so i was wondering if any of you have had a simalar problem as this is the time of year to try an sort it.
Any advice or help wecome
Thanks