LG Therma V CH14 fault code

What it means

Flow rate alarm

LG's own guidance is worth reading before you touch anything: flow alarms are LIKELY in the first two weeks after commissioning, because air pockets form and sediment collects in the strainer. LG recommends telling the customer to expect it. If the cause was air, a simple power reset can be enough once the air has reached the auto-air vents.

UK models this code applies to

From the LG service literature we hold (LG AWHP Service Manual MFL68682007 (© 2020, R32 Therma V) — error codes + component tables; scope: code SET & fan figure whole-range, compressor winding confirmed 12/14/16 kW, thermistor tables part-level) — not a scraped list.

Now the harder half: proving what caused it

CH14 names a symptom, not a root cause. In the app, the same code opens a guided investigation: what to measure first, the expected values for your exact model, and an honest verdict — including “nothing in this machine is broken” when that's what the readings say.