Bailey usually fit a 20a psu, which should be ok, mine is still working at 6 years old.
But they do run hot, put you hand on it an you will see what i mean.
Get it replaced and do what you can to allow air flow round the unit, do not pack anything near it, on very hot days if possible leave a door open, cupboard or bunk, depending on location, my 2004 senator is under the bunk, also i have refitted the unit to allow air flow at the back of the unit, packed it off, and drilled 2" holes in the wood behind it, over heating is a killer of all electrical devices, just apply common sense.