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Mitsubishi Ecodan F8 error

 
Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 2 hours ago
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 HJD
(@hjd)
Estimable Member Member
Joined: 4 years ago
Posts: 41
Topic starter 08/10/2025 12:58 pm  

Hi all - I haven’t been active for a while but still keep an eye on the ever helpful forum.

Just wondering if anyone has experienced an F8 error code with the Mitsubishi Ecodan PUZ series? A neighbour is getting it every time the outdoor temperature drops to below c. 5 degrees and the unit switches off.

Any thoughts appreciated.

Howard.


This topic was modified 2 hours ago by Mars

   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3552
08/10/2025 1:06 pm  

Almost certainly one for @ashp-bobba to put his Ecodan error codes to the test 😉 


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 JamesPa
(@jamespa)
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Joined: 3 years ago
Posts: 3046
08/10/2025 1:58 pm  

Posted by: @hjd
↑

Just wondering if anyone has experienced an F8 error code with the Mitsubishi Ecodan PUZ series? A neighbour is getting it every time the outdoor temperature drops to below c. 5 degrees and the unit switches off.

Has your neighbour tried googling it to find out what the code means (other search engines also available)?


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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