Error code73
Heat Exchanger (Pipe) Thermistor Error – When heat exchanger temperature thermistor open or short-circuit is detected at power up or while running the compressor. The manual's first action is: “-Check connection of connector, loose, or erroneous connection.”
- Model
- Fujitsu General 410A
- Display shows
- Heat Ex. (Pipe) thermistor error (73)
- Type
- Error code
- Source
- Manual p. 5
What 73 means
Heat Ex. (Pipe) thermistor error p. 5
Common causes
- When heat exchanger temperature thermistor open or short-circuit is detected at power on or while running the compressor. p. 5
What to do
- -Check connection of connector, loose, or erroneous connection. p. 5
- -Check thermistor for open or short. Check thermistor resistance value. (Ref. Thermistor Resistance Chart) p. 5
If 73 is still not resolved
The manual gives no further instruction for this code. Open the code table in the PDF or contact Fujitsu General service.
This page summarises what the manufacturer’s manual says about 73; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Fujitsu General. Found a mistake? Report an error.