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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22541
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Have a TrueDRY DR90 dehumidifier. Dehumidification

Customer Question

Hello. Have a TrueDRY DR90 dehumidifier. Dehumidification works great. The humidistat, if no dehumidification is requires, turns on the ventilation fan in the unit every three hours for 10 minutes via the fan control relay (P/N 50035445-001). Since I bought the unit, when it runs the fan via this relay the contacts in the relay "weld" together so fan runs continuously. Have replace the really once to no avail. How can I fix this?
Submitted: 2 years ago.
Category: HVAC
Expert:  BillyHvac replied 2 years ago.
is this an internal option relay or an aftermarket relay? you have make/model of relay?
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Customer: replied 2 years ago.
Factory relay. Indicated the Honeywell part number in body of question. Will look tonight to see if I can determine mfg. part number for relay. Relay was replaced once.
Customer: replied 2 years ago.
Can send schematic if that would help.
Customer: replied 2 years ago.
Relay is an Omron LY1F. Rated at 15 Amp at 110 volt AC with a 24 volt coil.
Customer: replied 2 years ago.
No response from new tech as of yet. Hopefully problem is still being worked by someone.

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