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Ph1l
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January 13, 2026
Solved

Does anyone know how to get into the plastic remote control box of a Mitsubishi Ecodan ASHP?

  • January 13, 2026
  • 4 replies
  • 81 views

i’m old, stupid & clumsy - knocked the remote control box on the floor. box on wall lost communication with it. RC box display is blank, so power is lost. Need to get inside to fix broken wire. How?

Best answer by Ph1l

Updated on 29/01/26 by Ben_OVO

Is this your controller 🤔

 

https://www.wolseley.co.uk/wcsstore/ExtendedSitesCatalogAssetStore/images/products/AssetPush/DTP_AssetPushHighRes/std.lang.all/nu/al/Mitsubishi_Ecodan_PARWT50RE_Manual.pdf?srsltid=AfmBOorkmY45aDvhlUbho1PCmt6tdDONsq5On0t1LfY_auMBfb4q2ra-

looks like it. Mr Engineer replaced the batteries and mine worked ok so I’m assuming the battery failure was coincident with knocking the RC on the floor. It’s a rubbish User Interface so I ain’t surprised it can’t warn you of a battery low condition b4 it reaches inoperability.

Mitsubishi’s help pages can be accessed here, and you can submit a maintenance form to Mitsubishi here.

 

There’s also some handy ASHP-related articles in our Forum Library section here.

4 replies

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Ph1lAuthorSolved
Rank 2
January 23, 2026

Updated on 29/01/26 by Ben_OVO

Is this your controller 🤔

 

https://www.wolseley.co.uk/wcsstore/ExtendedSitesCatalogAssetStore/images/products/AssetPush/DTP_AssetPushHighRes/std.lang.all/nu/al/Mitsubishi_Ecodan_PARWT50RE_Manual.pdf?srsltid=AfmBOorkmY45aDvhlUbho1PCmt6tdDONsq5On0t1LfY_auMBfb4q2ra-

looks like it. Mr Engineer replaced the batteries and mine worked ok so I’m assuming the battery failure was coincident with knocking the RC on the floor. It’s a rubbish User Interface so I ain’t surprised it can’t warn you of a battery low condition b4 it reaches inoperability.

Mitsubishi’s help pages can be accessed here, and you can submit a maintenance form to Mitsubishi here.

 

There’s also some handy ASHP-related articles in our Forum Library section here.

Ben_OVO
Community Manager
Ben_OVO
Community Manager
January 26, 2026

Morning ​@Ph1l, I hope you’re well and had a good weekend.

 

Thanks for letting us know that the engineer was able to get it fixed - great stuff. Thanks also to ​@johnr64 for your help with this one 😁.

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    Ph1lAuthor
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    January 26, 2026

    ​@Ben_OVO ty let’s hope it stays fixed

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