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Robertshaw 9600: Temperature rises too high, fan doesn't stop.

Temperature rises beyond setting. I usually have to switch to air conditioning/ summer to stop process and cool office. Sometimes (today) fan doesn't stop and temperature is up to 87 degrees. If I get the fan to stop and the temperature cools, I set it at night to 65 degrees with fan on auto. When I get to my office in the morning it may be 80 degrees with the fan non-responsive.

Thanks in advance for any advice.

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  • Dale Koehn
    Dale Koehn May 11, 2010

    thanks for your question, I would like a little more info if possible, what kind of t-stat do you have to run the unit ? if its programmable have you checked the programing? you may have a bad stat, if you would get back to us and let us know what kind of stat you have, if its programmable, some here can help you, thanks again, mr.grzz

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My ac has worked fine recently, but then today it has started to act weird. The house was at 78 degrees and when the ac turned on it went to 80 degrees. What is the problem?

Posted on Sep 01, 2009

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It sounds like the thermostat is wired improperly. One quick was to check is by finding breaker to unit and shutting off power. Go to thermostat and remove from wall take all wires off thermostat besides wire going to R(might be RcandRh) and C(which is common) Tape all bare wires removed with electrical tape. Now go back to the breaker and turn power back on. Nothing should be running at all. Take a voltage meter and measure the voltage from R to W(which is heating). If you read 24V then the thermostat is open and not calling for heat. Now turn the thermostat up so it is calling for heat. You should read 0V from R to W. If this checks out your thermostat is probally fine. You can check the fan the same way by going from R to G. In auto you shoul read 24V from R to G and in th on postion you will read 0V from R to G. If the thermostat checks out then the problem is probably at the furnace or rooftop. Either with the thermostat wiring or the main board acting up

Posted on Jan 22, 2009

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My 12000btu spliter air condition start and stop in 5 seconds


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If any of the following conditions occur, stop the air conditioner immediately, turn off the main power switch and contact the
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• The main power fuse often blows, or the circuit breaker is often activated.
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Tip

Keeping your whole home cool with central air.


Sometimes it is difficult to keep your home cool in the hot summer months. Also, some areas of your home may still be hot where other areas are too cool. Try this method to keep your home cool evenly throughout. Before you get started make sure your furnace filter is new. This will allow for maximum air flow.

If your living space is a single floor plan:

  1. Turn the air conditioning on
  2. Switch the furnace fan from auto to on.
  3. Measure the temperature in each room.
  4. Close the vents by about half in the cooler rooms
  5. This will force more cool air into the warmer rooms.
  6. Keep adjusting the vents until all the rooms have the same temp.

If your living space is on more than one level:

  1. Turn on the air conditioning.
  2. Switch the furnace fan from auto to on.
  3. On the lowest level of the house close half of the vents that are the closest to the stairs.
  4. This will force more cool air to the top floor where it is usually hotter.
  5. Cool air will sink from the upper floors which will keep the area near the stairs cool.
  6. Measure the temperature in all the rooms.
  7. Keep adjusting the vents until you have a nice even temperature throughout the house.
I found that leaving the furnace fan on all the time will keep your home evenly cool and comfortable. You may have to replace your furnace filter once a month due to the increased air flow. It will be well worth it in a cooler, more comfortable, and more energy efficient home.

Take Care,

Eric

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Have you confirmed that the thermostat is programmed correctly?

Did the thermostat ever control the temperature of the house properly?

When you indicate "kick", are you talking about flipping the Auto-On switch back and forth? The Auto-On switch only controls the fan, and no heating or cooling (Auto - fan runs on call for heat or cool, On- fan runs all the time.).

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