Danfoss FED self-acting room controller, OEM order code 013G5461 — a proportional room-temperature controller for sequence control of a cooling and a heating circuit. FED sensor for sequence control of cooling and heating circuit, 7+8m. The gas/liquid-charged sensing element operates one cooling and one heating valve in sequence with a neutral dead-band between them, so a single room controller changes over between cooling and heating without the two circuits fighting each other; it is self-acting and needs no external power, batteries or wiring. Supplied with 2 capillary tubes (7+8 m, 15 m total) linking the room sensor to the Danfoss FE-series climate valve(s) it operates. Genuine Danfoss part; technical data quoted verbatim from store.danfoss.com (code 013G5461). OEM P/N 013G5461, EAN 5702420047805. HS 9032.10 (thermostats). Modulates refrigerant flow to the evaporator in response to superheat at the evaporator outlet.