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Mitsubishi Ecodan 11kw Defrosting Issue.

 
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Air Source Heat Pumps (ASHPs)
Last Post by ASHP-BOBBA 1 month ago
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dgclimatecontrol
 dgclimatecontrol
(@dgclimatecontrol)
Estimable Member Member
Joined: 3 months ago
Posts: 43
09/09/2025 4:35 pm  

@morgan When you remove the cover most people will find it daunting so I would say leave well alone. I've never seen any ME sensor in the wrong location and they must have the strictest manufacturing methods of any brand.   Its also not the installers job to check them unless a problem is diagnosed. Most wouldn't have a clue if they had been fitted correctly from new, apart from perhaps the return air sensor.



   
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Morgan
 Morgan
(@morgan)
Noble Member Member
Joined: 5 years ago
Posts: 644
09/09/2025 4:42 pm  

Posted by: @dgclimatecontrol
↑

@morgan When you remove the cover most people will find it daunting so I would say leave well alone. I've never seen any ME sensor in the wrong location and they must have the strictest manufacturing methods of any brand.   Its also not the installers job to check them unless a problem is diagnosed. Most wouldn't have a clue if they had been fitted correctly from new, apart from perhaps the return air sensor.

@dgclimatecontrol

I have no intention of removing the cover. As you suggest, way too daunting for me. Thanks for the input. Appreciated.

 


Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.


   
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 ASHP-BOBBA
(@ashp-bobba)
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Joined: 11 months ago
Posts: 281
09/09/2025 10:19 pm  

@hcas and @others This is something I picked up over the years, most brands have the same issue, most sensors are in their pockets and ok but, once in a while one can be slightly off and it is easy to visually check them and "wiggle" them, paste them or re-fix them rather than the values slightly off, it can sometimes be hard to work out whats not quite right when you get slightly offset values due to a loose probe. In this case on install and commissioning and during a service we just check every probe, its just to make sure.


AAC Group Ltd covering the Kent Area for design, supply and installation of ASHP systems, service and maintenance, diagnostics and repairs.
Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.


   
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 ASHP-BOBBA
(@ashp-bobba)
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Joined: 11 months ago
Posts: 281
09/09/2025 10:20 pm  

@morgan this can just be done by your sepecilist when they service the unit, infact you could insist on it as part of the service.


AAC Group Ltd covering the Kent Area for design, supply and installation of ASHP systems, service and maintenance, diagnostics and repairs.
Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.


   
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