There's a Frigidaire heating and cooling unit in the attic, and the thermostat is a White Rodgers (programmable). Air is blowing, but it is not HOT, though the thermostat is set at a high temperature. I have turned the switch to OFF, but the fan continues to blow. There is another compartment (as the heater lies on its side) that indicates that it's to only be open for servicing. I'm think that there is some sort of RESET button needed. Recently, new insulation was added to the attic. With higher outdoor temperatures is it possible that the it's too hot up there and the continuous running stems from an overheated unit? Step in San Francisco

http://www.emersonclimate.com/Documents/White-Rodgers/sell_sheets/wr0464.pdf Here's a data sheet for you.

Blinking snowflake means it's on time delay for cooling to come on (usually 5 minute time delay to prevent compressor short cycling). Solid snowflake means cooling is on

To disable EMR, clip jumper W903

The Orange wire for the reversing valve and used with a Heat Pump
If you have a heat pump, then yes. If you have a gas furnace then no. If you have a HP and the reversing valve is not connected, then you might just be using the emergency electric heat strips. :-o

Thank you for your interest with Emerson White Rodgers. My Name is Joselito Laxamana from White- Rodger's. Base on your description you have a system problem not a thermostat issue. You need to contact your installer to check you cool equipment.

Hello,Good job with description.Something is keeping the condenser off(saftey).Do you have an emergency heat setting on the therm.It will run electric heat strips only until service can check it out.Very rare that the disconnect switch (black box) is it.Need electrical meter to prove it out.

Set System Switch to Cool and lower setpoint below room temperature.
Verify thermostat and system wires are securely attached.
Diagonistic: Set System Switch to Cool and lower the setpoint below the room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation ( . If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating system is operating correctly.

Reset the thermostat by pressing , UP,DOWN and TIME at the same time.

I have only seen one Honeywell thermostat that would work with a 3-wire heating system.

I would replace it with a White-Rodgers 1F80-0471. They are about $100, but they are a good thermostat, and they work well with the 3-wire zone valves.

Most other thermostats have the "Y" terminal that you need, but do not control the zone valve correctly.

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- Fairbanks, Alaska -

This is the corrcet wiring:
G - G fan relay
R - RC1, RC put a jumper RH ( to supply power to the cool and heat)
L - no wire connected (malfunction indicator) tape- off that wire
E - Emergency heat relay
B - W/B ( reversing valve in your heat pump energized during heat )
W2 - Auxilliary heat
Y - Y1 ( compressor contact)
O- Y/O ( reversing valve is energized during cool)
make sure that the system selector is on heat pump position.

What were each wire connected to on the white rodgers? The connectors on the white rodgers should have markings. Tell me this and I can tell you how to wire your new stat. This hunter will not work with multi stage heat pumps..so I need to know what was connected to what on the white rodgers to know what type of unit. Thanks Kevin