Heating/cooling unit- Run for a certain minute then it turn-off
We have a roof heating/cooling unit carrier model no. 48tje006, ser.No. 3499g21132 and it prompts at the panel 4 red light flushing means- "4 consecutive limit switch faults". What does it mean this problem? It is the thermostat problem need to replace?.Please answer and give me an idea howto solve.
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The cold that you describe may be just unconditioned air? If you are certain you can hear the comp operating for a couple of minutes, and then the heat starts, I would guess it is a reversing valve issue if it's a heat pump and it probably is. Or the control board acting up. I've had a lot of issues with the boards in the Amanda PTAC units. I can't remember how to configure it, but if you Google "Amanda ptac configuration", there is a lot of info online. May try a reset method first. Hope this helps!
You are <b>building a log home</b> or a home that you want the rustic look of the <b>floors above also being the ceiling of the floor below</b>. You hate the thought of having to install ugly <b>heating and air conditioning ductwork</b> in your new home. For you there is hope. You can still have a comfortable home and have the look that you want.<br />
The advancements in <b>ductless heating and cooling</b> has made it possible for you to have those wood ceilings, roof lines, wood walls, and everything you can think of. The new <b>ductless HVAC units</b> take up very little space on your wall. They can be placed almost anywhere with a little planning, and they are<b> very efficient at both heating and cooling</b>.<br />
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If you are concerned about the looks on the outside, that too can be fixed rather easily. The <b>piping and wiring going to the indoor units</b> is relatively small and can be hidden in many ways by using a little imagination. Colored aluminum can be fabricated to cover the pipes. I have also run the piping through rain spouting and made it to look like just another rain spout coming off of the roof. <br />
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Good<b> heating professionals</b> can find many ways to make these units work for you. Make sure that you do not settle for something less than you want. You may need to look at more than a few companies to find the one that will give you the system that you want.
Could be over heating and the unit shuts down till it cools off. Check the dryer vent line for clogging all the way up to the vent by the roof. Bet it is clogged some where and that is the cause of your problem.
Seems like the fan relay has stuck (Likely to be on the main indoor PC board) or if the machine was being used on heating mode, the indoor pipe sensor may have failed causing the fan to continue to run. Most air cons on heating mode, will keep the fan running for a few minutes after you switch off on heating mode to cool down the indoor unit before it turns off completely. The pipe sensor signals the main PC board to tell it that the unit has cooled down and can now turn off completely. If either of the above faults occur, the indoor fan will keep running all the time.
If the air conditioner compressor runs all the time the main control board might be defective. The main control board provides the voltage to the fan motor and compressor. These boards are often misdiagnosed. Check all other components to be certain this is the cause of the problem.
1. pull the unit out from the wall
2. Remove the screws holding on the larger rear panel.
3. Using a vacume cleaner extension, remove as much debris as possible from all accessible components.
4. Clean out the dryer vent and the connection to the wall, making sure that air can pass easily.
THAT SHOULD DO YA. If the heat continues to cut off, you are dealing with a faulty heating element in which case you will be best off to purchase a new dryer. (replacing a heating element is typically the beginning of a failing unit)