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This is my first central heating and cooling unit the heat will come on and heat the house but the big fan inside the unit is not running like it did when we would run the ac is this normal

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I assume you are reffering to the compressor outside not running. If so this is for A/C only. In fact once the cold is here to stay you should shut off the compressor "breaker" (located either outide next to unit or in fuse panel) and get a good quality cover for winter. This will keep the leaves and snow out of the unit. Just dont forget to take it off in the summer before you run the A/C or you will damage the system.

Posted on Sep 16, 2008

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Fan doesn't work in heat mode it works on all other functions. Heat does come out but fan doesn't kick in. Outside unit is operating


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Nov 01, 2015 | Air Conditioners

Tip

A Great Tip For Saving Money


While everyone usually remembers to change their AC and Heater filters, no one thinks about cleaning the heating or cooling outdoor coil. If you have an outdoor unit for heating or cooling, those coils need to be clean too!!

The principle of an HVAC unit is to remove heat or cold from your home to make sure you have a comfortable temperature inside.

If you have a gas furnace, your good to go in the winter. Make sure you change your filter every month and you should be able to keep your home at an nice temperature for you and your family. BUT, if you have an air conditioning unit hooked up to cool your house in the spring and summer, you need to do a little maintenance every spring to make sure you get the most out of your unit and save money. The same principle works for a heat pump, so i'll break it down for each unit.

1. An air conditioning unit that has a gas heater works just like it sounds. In the winter, your thermostat will tell the heater to turn on. You will have your burner running until the fan switch in the heat exchanger gets to the right temperature to turn the fan on. This is so you don't have cold air circulating through the house. Cooling on the other hand works a little different. If your thermostat calls for cooling, your fan will turn on right away and your condensing unit outside will turn on. What you AC is doing is removing heat inside the house and putting it somewhere else. That;s where your condensing unit comes in. The heat you removed inside the house is transferred outside where it is compressed and cooled through the use of the outdoor fan.

Now, imagine if this outdoor unit has dirty coil. You are no longer able to remove the heat from the house because it's not able to be removed because of a dirty coil. This means a huge loss in cooling capacity, higher running amperage on the compressor, and your electric bill being alot larger than it needs to be. I'll have the solution after I address the heat pump.

2. Now, the heat pump. It is basically an air conditioning unit that can reverse. In the summer, the outdoor unit will blow hot because of the heat it removed in the house. In the winter, the outdoor unit will be blowing cold because it is using the heat outdoors to add heat into your house. While this sounds weird, it's engineering at it's best. In the winter, heat is able to be removed from very low temperatures and your able to transfer heat into the house because you have a compressor in your unit. It does what it says. It takes a low pressure-low temperature refrigerant and compresses it into a high pressure-high temperature refrigerant.

Now, getting to the coils of both units. You need to clean the outdoor coil on both units every spring to make sure you have a clean coil. In the long run, this will allow the unit to expell the heat gained from the house and in the long run will add life to your compressor and save you money.

On the heat pump, you'll also need to clean the coil every fall. This is because if you don't, you could have a problem with freezing your outdoor coil. If you can't remove the heat from indoors, you will slowly turn your outdoor coil into an icemaker!!

So, based on what you have, turn the power off to your outdoor unit. Spray very good with a degreaser such as simple green and let it sit for about a half an hour. Then, grab your hose and wash out the coil. You'll be amazed what comes out. Let it sit for a coup0le hours to dry out, then turn the unit on.

This will not only extend the life of your compressor, it will also save you money in the long run!!

on May 11, 2010 | Air Conditioners

1 Answer

My outside fan will not run and the inside unit runs constantly. can't push the reset button on unit outside


Your out door unit fan motor not runs due to pressure not build up at Heat mode. If its cool mode only fan runs with compressor when thermostat calls for it.

Without having technical knowledge, don't press any reset button. Hope it's helpful?

Dec 09, 2010 | Ruud Central System Air Conditioner

1 Answer

Goodman central air conditioner not blowing normally


It sounds like the compressor is not coming on in the outside unit. If it worked fine and was cooling before, then your compressor probably over-heated and tripped the internal overload switch which causes it to stay off while everything else is working. The most common cause of your compressor over heating is an incorrect refrigerant charge, though it could be a few other things like a restriction in the copper line set. You will be able to hear the fan motor and the compressor kick on if you listen close while the system first turns on. If the compressor is over-heated, then after it cools to a save temperature, it will come on again, but only till it over-heats again. I would have the charge checked on the system, but remember that if the compressor is over-heated when the technician gets there, there is nothing he can do until it cools down and time is money! It's best to not run it until the problem gets figured out. Hope this helps and points you in the right direction. Good luck!

Jul 17, 2010 | Air Conditioners

1 Answer

I have a bryant model 702b packaged unit with 5 wire thermostat wiring coming out of the unit. R Y B G and W. The thermostate in the house is 5 wire and goes to the old central unit and them has a 4 ire...


R-Red is power
Y-Yellow is cool
B-Blue is cool as well
G-Green is fan leg
W-White is usually heat Leg


If you have no indoor unit and this is a ac/gas or
electric outdoor unit try this.

R to R/Red to Red
G-G/Green to Green
Y-Y/Yellow to Yellow
W-W/White to White
-Dont Hook up Blue.

Turn power back on turn the fan to on,fan should run
Turn to Heating, heating should come on
Turn on Cooling,if cooling does not come on switch yellow with blue.

Jul 02, 2010 | Air Conditioners

1 Answer

TRANE 1984 Home A/C Where are How to Clean Coils inside House


the best thing to do it with airhandler shut down at breaker. 1st soften dirt and crud with 409 or different brand. 2nd take a wire brush and clean in up and down motion following the fins on coil.3rd rinse with spray bottle . this is the best you can do without coil removal.

Jul 02, 2009 | Air Conditioners

1 Answer

Fan running constantly in the house


Check t-stat and make sure fan is set to "Auto", that might be why fan is running all the time, or it could be a fan relay that is stuck closed. It sounds like you A/C is over charged or you have a bad high pressure switch, this was a common problem with this manufacture especially in the heat mode.

Apr 24, 2009 | Ruud Central System Air Conditioner

1 Answer

Ruud 12 seer heat pump not heating


It sounds like the unit is tripping off from high pressure. Check you filter and indoor coil. You may have low air flow inside that is causing the refrigerant pressure to be to high.

Mar 22, 2009 | Ruud Central System Air Conditioner

2 Answers

Heat coils in central air conditioning unit look fine under examination, checked with an ohmmeter both coils showed continuity. Power at both coils indicated 110 volts. Unit fan runs fine but there is no...


Are you getting 120 vac or 220 vac at the unit? Check the voltage at the first terminals inside the unit as well as the breaker. You should have 220 vac at the elements and you are dropping a leg some where.

Jan 17, 2009 | Air Conditioners

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