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First Co Fan Coil Unit

1774 Views 8 Replies 5 Participants Last post by  supers05
Hi. I have a First Co Fan Coil Unit in my condo. Model no. 24RAOT-3.

The unit blower turns itself on for about 30 seconds at a time when the thermostat is in the OFF position. It does this randomly and without warning.

Any ideas how I can troubleshoot this? thanks!
1 - 1 of 9 Posts
- Your fan relay is closing for some reason(crud in the contacts)
- or the pump relay is doing this
- thermostat has crud in the contacts somewhere and is sending a false signal.

Disconnect the thermostat (or just the r wire) and monitor. If it is still randomly turning on, it's one of the relays. While you could isolate which one, they are cheap and easy to change. If recommend changing both at the same time. However if the trouble stops, you'll need a new thermostat.

1 - 1 of 9 Posts
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