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MHRV not extracting

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  • 17-01-2022 4:58pm
    #1
    tomred1N
    Registered Users Posts: 434 ✭✭


    Any one have any ideas.

    Have changed filters , pushing in cold air in all vents but not extracting from any vents

    Its an ITHO HRU ECO , 10 years old , no issues until now !

    thanks



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    #2
    MicktheMan
    Registered Users Posts: 2,833 ✭✭✭MicktheMan


    Had a similar issue with my system a few years back. Thought the extract fan had failed but was good when I checked it.

    The issue was a clogged extract grill (I had changed the grill for a ss bullnose type and in it was a fine mesh that got clogged with fine dust and organic growth over time)



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    #3
    tomred1N
    Registered Users Posts: 434 ✭✭tomred1N


    Thanks …….Opened up the unit after downloading instructions and messed around with bypass / freeze protection and after a while I could feel warm air ……..went back down from attic and it was extracting again …….no idea what I did but maybe the freeze protection mechanism had activated and not reset ……..working away fine again anyway 👍



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