Heat pump & air con fault codes
What each code means, in plain engineer English — and which UK models it applies to, from each manufacturer's own service literature. Anyone can tell you what a code stands for; the model list is the part that took the manuals.
Mitsubishi Ecodan heat pumps →
Grant Aerona heat pumps →
Vaillant aroTHERM heat pumps →
Viessmann Vitocal heat pumps →
F.1F.2F.3F.4F.7F.8F.13F.14F.33F.34F.74F.75F.87F.91F.92F.93F.94F.99F.100F.101F.102F.103F.104F.111F.112F.117F.118F.123F.124F.147F.148F.149F.150F.151F.152F.155F.156F.160F.425F.430F.431F.454F.472F.519F.520F.542F.543F.544F.545F.546F.547F.548F.549F.623F.624F.625F.626F.627F.628F.629F.630F.685F.686F.687F.770F.771F.772F.773F.788F.790F.791F.792F.793F.797F.798F.799F.800F.801F.808F.812F.819F.820F.823F.824F.827F.829F.830F.831F.832F.833F.834F.835F.836F.837F.838F.839F.841F.843F.845F.846F.847F.848F.864F.865F.866F.867F.876F.881F.912F.913F.983F.984F.985F.990F.991F.992F.993F.994F.995F.996F.997F.998F.1009F.1010F.1011F.1012F.1045F.1049F.1050F.1051F.1054F.1056A.2A.11A.12A.16A.17A.21A.62A.63A.65A.66A.68A.70A.71A.72A.73A.74A.75A.80A.81A.82A.83A.84A.85A.86A.87A.91A.93A.94A.96
LG Therma V heat pumps →
Samsung EHS heat pumps →
Panasonic Aquarea heat pumps →
NIBE heat pumps →
Bosch Compress heat pumps →
Daikin split air conditioning →
Daikin Altherma heat pumps →
7H-01E3-00E4-0089-028H-0080-0081-00C4-00CJ-02C0-00E1-00AH-007H-047H-057H-067H-077H-0881-01C5-00H1-00H9-00HC-00HC-01J3-00J6-00J6-07J8-00P4-00H0-00H6-00H8-00E3-24JA-00JA-17HJ-10C0-01C0-02F6-00FA-00H3-00A5-00F3-00E6-00L9-00L5-00H5-00E5-00P3-00L1-00L8-00A1-00L3-00L4-0089-0189-0389-0589-068F-008H-018H-028H-03AA-01AC-00EC-00AJ-03U0-00E9-00EA-00E7-00E8-00U2-00P1-00U1-00E2-00LC-00U4-00U5-00U7-00U8-06U8-07U8-02U8-03U8-11PJ-00UA-00UA-17U8-09U8-04U8-05U3-00EC-04UF-00
Gree air conditioning →
Midea air conditioning →
Kaisai air conditioning →
Haier air conditioning →
Fujitsu Waterstage heat pumps →
30832124414424434445161123324262637172737477788486949597A1A3A5AC1/12/33/13/24/14/26/16/26/36/46/56/76/87/17/27/37/47/77/88/48/69/49/59/79/810/110/310/410/510/9cont. 1s/1scont. on / off1 flash2 flashes3 flashes4 flashes6 flashes7 flashes8 flashes9 flashes11 flashes12 flashes13 flashes14 flashes15 flashes16 flashes17 flashes18 flashes20 flashes23 flashes24 flashes
Fujitsu General air conditioning →
Toshiba air conditioning →
Hitachi air conditioning →
Worcester Greenstore & Greensource heat pumps →
Knowing the code is the easy half
The app takes the same code and walks the fix: what to measure first, the expected values for your exact model, and a diagnosis that tells you when the machine isn't actually broken.
Chase your code on your machine →Free, no sign-up. Pick the make and model, put the code in, and follow the manufacturer's own chart.
Or put your readings in →