Nothing wrong with these 2 mystery 2 pin items, but I like to identify such mysteries and place on the www.
In the fan air-stream a 1.5mm sphere I assumed to be a bead thermistor , measures 58 ohm, in circuit, but no change with freezer spray. Blue bead with a white letter H marked on it.
2 off per channel amp, black epoxy potted lumps, about 8mm cube, with a large letter M on them. Measure about 150 ohm , in circuit, and no change on freezer spray-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on