On 24/04/2018 16:22, wrote:
On Tuesday, 24 April 2018 11:36:30 UTC+1, Lobster wrote:
I've got a dehumidifier, a few years old now. Recently I've been getting
the 'defrost' warning light on all the time, supposedly indicating that
either the ambient tempoerature is too low (it isn't) or that the air
filter is clogged (it isn't).

The fan and compressor run apparently normally, but the unit is no longer
collecting any significant amount of water. I've opened up the unit while
running, and it's copper cooling coils feel about room temperature.

The model is a B&Q-branded WDH-610HA (see
https://www.amazon.co.uk/dp/B00AFCMTXO)

Any ideas what's wrong, please, and if it's fixable?

Thanks

If the cold side of the coil (on the air intake) isn't getting cold after the compressor has been running for several minutes then it's lost its refrigerant gas and is not realistically repairable. The outlet side coil never gets cold of course.


NT

It might be the solenoid that reverses the warm gas flow to melt the ice
on the cooling coils has failed. I would investigate this and try and
disable it before assuming the gas has gone.

This is now my 30 yo ebac homedry works. There is a 555 timer that
triggers for 5 mins, once an hour to operate a solenoid that backfires
warm gas through the cold coils melting any ice.

when I took it to Fiji I phoned ebac and they said because the
heat and humidity would be so high I could just pull the spade
connector off the solenoid and allow it to drip into the
container all the time.