Chiller Hack (DIY)

[cyclopath]

This may prove useful for folks performing similar tricks who find they need to spoof the temp sensor…

Overriding Lower Set Limit on Mini Split Heat Pump

just in case you feel the need to : RTFM ac012mnadchaa.pdf (4.8 MB) Resistance is futile? [image] Nope: you could replace that glass of water with one… And if you’re clever about it, you can use another resistor across the temp sensor (parallel) to spoof it in a controlled manner: Coolant Temperature Sensor (CTS) Resistor Trick You want 13C to read as 20C. So you need to lower 18000ohm to 12000ohm 1/R = 1/R1 + 1/R2 1/12000 = 1/18000 + 1/R2 => R2 = 36000 Most flexible solution would …

Cheaper than a Coolbot