Question about Honeywell Programmable Thermostat Heater

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My honeywell programmable thermostat chronotherm IV plus (ac cycle)shuts down after 25-30 sec and displays a flashing wait. It turns back up again in few min only to shut off in few seconds. I have turned the system off to reset it, but no luck.

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Hi, if this thermostat has batteries, try and replacing them. It sounds to me as though the circuitry in the sub-base has a problem keeping the stat programmed. Shutting down with in 30 seconds and back on only to shut off again tells me that the sensor that is a part of the circuitry on the sub-base that senses the rooms temperature, has failed and it cycles on and off. If it does have batteries, change them to see if this solves this problem. If no batteries, shut the power off to the a/c and remove the cover to the stat. If this does not expose the control wires, you will have the stat sub-base to remove. It will have several small screws that will need to be loosened to get to wiring. If your system has a gas furnace or electric heat and not a heat-pump, you will have terminals marked like this. RH, RC, with a jumper wire connecting the 2, W white for heat control, G, green for fan control, and Y, yellow or they may have used blue for cooling control. You can pick up a new programmable thermostat at Home Depot, Lowe's hardware for this for around $30. It will come with the Red jumper already wired in and this is where you connect your existing red to either one, but leave this jumper on. This will solve your problem. If you have no gas furnace and it is a heat-pump, it will have many more wires and terminals such as this, R, W-1, W, E, O, B, Y, C. Draw your self a diagram on the wire terminals and colors of all wires and what terminals they are connected to so you get it right and take this along to match it with the correct heat-pump thermostat. Honeywell has good dependable stats, so try and stay with them. If the price for one is off the wall, go with a White Rodgers, Hunter, Carrier, and just look them over good. Read to see if they have batteries for the display and if they are included with the stat. This will solve this problem. Please don't forget to rate me on this as I know you will be kind. I will be checking in to see how you are coming along and if you need more help as I will be here.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor.

Posted on Aug 30, 2010

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Hello A flashing WAIT in A/C mode is the built in anti-short cycle timer.If you switch from heat to cool or adjust the thermostat on/off or raise/ lower temp within a 5 min.peroid it will not allow the unit to run untill time is up.

Posted on Aug 30, 2010

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