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Plumberpro
Plumberpro, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience:  Heating and hot water heating appliances experienced
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We have a ROE+ 18TH pompe a chaleur (heat pump), the external

Customer Question

We have a ROE+ 18TH pompe a chaleur (heat pump), the external 'radiator' of which gets totally frosted up causing an extreme fall off of heating to the house. The frosting is not part of the 'normal' cycle but becomes a huge, solid build up of ice if the system is left on.
The interior PAC unit is functioning normally. Any ideas please?
Submitted: 1 year ago.
Category: Appliance
Expert:  Plumberpro replied 1 year ago.
Customer:

. the unit should have gone into a defrost cycle before it got to icing up that badly

Customer:

Make sure excess water isn't dripping onto the unit from somewhere , ie leaking gutter

Customer:

Check that the unit can drain ok and not blocked with leaves etc . if this is ok then it will be a fault with the unit

JACUSTOMER-qvq2lg0z- :

No blockages.....no leaks. Can you be a lot more specific regarding what sort of problem with the unit.

JACUSTOMER-qvq2lg0z- :

Thanks

Customer:

To be honest I am not familiar with your particular unit but this is a list of potential faults particular fault



  • Defective defrost control or timer.

  • Defective defrost thermostat or sensor.

  • Defective defrost relay.

  • Sticking reversing valve.

  • Defective reversing valve solenoid.

  • Defective outdoor fan motor.

  • Low refrigerant charge.

  • Refrigerant restriction

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