Lacrosse Technology WS952OU - display won't show outside temps and now after removing/replacing batteries numerous times, shows message OFL.

my unit tells me to insert fresh batteries into the outside sending unit first. then insert new batteries into the inside receiving unit. after the outside temperature shows up, then can reset my inside unit's time, choose F or C and
switch channels. please try changing channels if your
outside temp doesn't show. you can do both units in the house then put one outside after they work properly.

try changing channels on all sensors and the receiver.. You will have to go through a wait time as before. This worked for me last year, but mine eventually failed completely this year

My most consistent (best, repeatable) results with this process are to replace both sets of batteries, both in the clock and in the outside temperature sensing unit. Start by removing all batteries out of everything. Now replace the batteries in the outdoor unit, then (within 30 seconds) replace the clock batteries. The temp unit should begin communicating normally within 5 minutes (or less) and yes, you will have to reset the clock,

Based on a different, but similar, LaCrosse model (the WS-8611), it would appear to be an OverFlow indication, meaning that it's out of range. Here's a quote from that unit's manual:

SPECIFICATIONS:
Temperature measuring range:
Indoor : 14.2F to +139.8F with 0.2F resolution
(-9.9C to +59.9C with 0.1C resolution)
("OF.L" displayed if outside this range)
Outdoor : -39.8F to +139.8F with 0.2F resolution
(-39.9C to +59.9C with 0.1C resolution
("OF.L" displayed if outside this range)

It is likely that their convention remains the same across models, but I don't work for them, so I can't guarantee it.

Restart as if from new ie as if it is being taken out of the box