Temp Control Knobs lights went out (92 Accord Lx)

Both Temperature Control Knobs lights went out at the same time. Should I suspect a fuse?

92 Accord Lx

Maybe, fuse 23 (15a) powers all the lights inside the cabin plus tail lights, marker lights, glove box, vanity and a bunch of other lights. If they work and the heater control lights don.t' it is not the fuse. All the dash switch button lights including the heater control lights also go through a dimmer control unit on the way to ground. So if they work, it is not the dimmer control unit. So you need to tell us if other lighting stuff is not working. If everything else works, it could be the light bulbs.