@IAAA @NSFVoyager2
The Voyager instruments are kept "warm" using heaters and heat from the Radioisotope Thermoelectric Generators (RTG).
Over time, most heaters have been turned off, as RTG power has dropped, and the remaining instruments are kept at different temps depending on their capabilities.
Most instruments were designed for -35°C, but some are functioning at much colder temps.
Hydrazine has to be kept above 1.6°C.
Have not seen any info on the temp. of the DTR.
voyager.jpl.nasa.gov/news/deta