it is simply an electric heater that keeps the txv head warm. during low ambient conditions (or at least when the ambient conditions are colder than the suction line temperature), the fluid in the powerhead/bulb can condense in the head (which is below the bulb) instead of being in the bulb.
Originally Posted by dave1234
How to make the perfect "Half-Hitch" knot or any other boyscout knot in 3 easy steps...
1. Remove your meter leads from the meter and very carefully return them to their storage case or bag.
2. Wait 2 seconds
3. Very carefully remove your meter leads from their storage place and enjoy your new knot!