Low fan / Recirc fan runs continously

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Old 09-27-14, 09:36 PM
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Low fan / Recirc fan runs continously

Have a Carrier furnace with electric heat and a heat pump. Thermostat is set on auto fan and auto system and low fan continuously runs. Turned stat to off and tried removing the stat and the low fan still runs. Have to turn off power at breaker to stop low fan. Any ideas
 
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Old 09-27-14, 09:44 PM
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Does the system still heat and cool?
What is the model number of the air handler?
 
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Old 09-27-14, 10:27 PM
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Yes, still heats and cools

Model # Fv4BNB006
 
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Old 09-27-14, 10:40 PM
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Have you tried disconnecting G at the air handler?
Disconnecting R would be another test.
 
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Old 09-27-14, 11:25 PM
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Disconnected G, fan still runs.
Reconnected G, Disconnected R, fan still runs
 
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Old 09-28-14, 09:30 AM
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http://dms.hvacpartners.com/docs/100...IM-FV4B-02.pdf

Do you have a volt meter?
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Last edited by Houston204; 09-28-14 at 10:42 AM.
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Old 10-05-14, 08:20 PM
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Thank you for the help so far!

Was going to do the checks you described, cleaned out around the furnace and there was water of the floor. Opened up the compartments and there is water in the tray below the coils and water dripped ( coils above fan, air flows down) into the fan compartment. There is water on the pin connector and easy select board and light rust on frame in surrounding area.
Unless you know of an easy reason why water is not going out the drain I may be better off to have a repair guy come out and check the entire set up.

What do you think?
 
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Old 10-06-14, 08:34 AM
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check drain pipe for obstruction,
also check that there is no leak for air to be admitted into the drain pipe between the trap in the drain pipe and the handler because the air will be sucked in there preventing water from running out.
 
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Old 10-06-14, 08:57 PM
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Thank you, it was obstructed. It is working great now.
 
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