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Not getting 24 volts to condenser

3.5 ton with handler gsx16042 outside avptc4214 inside garage

Posted by Anonymous on

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  • Goodman Master
  • 1,363 Answers

Wire probem in 24 volt system or thermosta issue.

Posted on Aug 11, 2015

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Posted on Jan 02, 2017

  • 1073 Answers

SOURCE: we installed a 4 ton

you have a missmatched system, for it to work try removing the orfice on the high side txv it is not allowing the evaperator coil to fill with refrigerant properly coleman and intertherm dont like each other since they control a large market in the manufactured housing heating and cooling units electricaly connecting the componets together no issue prefromance sometimes is the issue hope this helps

Posted on May 08, 2008

  • 3 Answers

SOURCE: Carrier air handler tonnage?

That is a fairly large difference. It is usually ok to have the inside evap. coil and blower up to 1 ton larger than the outside condenser. That will make the unit slightly more efficient as well as less likely to freeze up on low airflow situations. It is not recommended to install a new condenser on an old evap coil. There has been a lot of changes to the design of the coils in the last little while. For example a 10 year old 2 ton coil may only have 3 cubic feet of volume but a new 2 ton coil may have 4 cubit feet of volume.

There are many factors that may have infulenced the decision on what size condenser to install. Many of which can only be done by visiting the home and doing alot of work, checking the duct sizing bioth supply and return, inspecting the insulation and windows of the home etc. etc. Most of the time that never gets done. You can blame the contractor for not doing a complete check, but at the same time you can blame the customer because many contractors that are that good loose the job to a cheaper bid that did not no any of the research. It is a catch 22 for everyone involved.

There is ALOT more to sizing equipment that many people think, sadly that also includes many HVAC contractors. Way too many people use "rule of thumbs" or flat out "guess".

Sorry for the rant but your queston can only be answered by a good well educated HVAC contractor visiting your home. That type of a contractor is getting hard to find these days in such a price competetive world.

Posted on Oct 14, 2008

  • 1 Answer

SOURCE: Rheem Air Handler will not run

We tried to bypass at the Tstat. Thanks for your time and interest.

Posted on Apr 12, 2009

james3751
  • 614 Answers

SOURCE: Can Air Handler !1/2 ton run with 2 ton

Its done all the time. It is sometimes better to do this because you run a colder coil and rmoves more humidity. The newer unit have variable speed fan and run slower to do the same thing. Remember the lower the humidity the higher you can raise your tsta. Example In arizona at 95 degrees you dont feel the heat as much because of the lower humidity. Its ok to do so. You get more btus out of your unit that way. Rus. I have dozens of units with air handlers 1/2 ton smaller...

Posted on Jul 18, 2009

  • 232 Answers

SOURCE: 3 ton condensor and 2.5 air handler

I hate to use rules of thumb but 500sqft per ton depending on your windows and insulation. you are probably ok with a 2.5 ton however it will not work with a 3 ton outdoor unit as you have figured out. depending on how long that ac has been in you may want to replace it with a 2.5 ton due to the damage to the compressor valves because of the mis match. or if the indoor is newer and the original system may have been a 3 ton then i would replace the A/H. and be prepared to replace the outdoor if the valves are to far gone. If the trane is a new high effiency 2 and the goodman is just a 10 SEER you may be able to have a txv installed on the trane unit and a kickstart device outside. but only if its a high effiency but their again if the A/C fails you couldnt have a high effiency 3 ton you would have to drop down to 2.5,

Posted on Sep 22, 2009

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1 Answer

What are the tons of a RUUD AC HANDLER MODEL UBHA-17J11 SO SFFA SERIAL NUMBER MOO500 03485 and what type of CONDENSER & TONS CAN IT HANDUE WITHOUT PROBLEMS?


You can find the tonnage in the model number which increases by increments of 12, so if the model number is 24 =2 tons. Model number on your a/handler is 17. Thats a ton and a half. Really should match the evap and condenser for the best efficiency. ...

Sep 24, 2015 | Ruud Heating & Cooling

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What cause 3 amp fuse to keep blowing when power in turn on goodman air handler


The 3 amp fuse is in the red low voltage (24 volt) thermostat wire
and only gets power when the thermostat is set to turn on heat or a/c It should be connected to the red wire from the thermostat

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you have condenser issue. check at outside unit for 240 volts to contactor and 24 volts to contactor coil.

May 11, 2013 | Ruud 3 Ton Split System Heat Pump

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Replaced capacitor on fan in air handler now condenser will not run and fan on air handler will not shut off


fan relay stuck in & control fuse might be blown. see if you have 24 volts at outside unit.

Jan 17, 2013 | Gibson Heating & Cooling

2 Answers

I have a T3BA-036KA the outside unit will not


You need 24 volts going to the coil of the contactor. If you do not have 24 volts, you will need to trace the wiring back to see where you are losing it from. Try placing your voltmeter at C & Y coming from your air handler. If not, go to your air handler and test for 24 volts ac at C & Y coming from your thermostat. If you do not have 24 volts coming from your thermostat, there is either a problem with the thermostat or there is a problem with the wiring between the thermostat and the air handler. If you have 24 volts at the air handler coming from the thermostat but you do not have 24 volts at the outdoor unit coming from the air handler, then you have a problem with the wires between the air handler and the outdoor unit.

I hope you find this information to be very helpful to you moving forward. Please leave a rating. :-)

May 10, 2010 | Intertherm P3RA-036K Air Conditioner

1 Answer

What is the size of coil in air handler is it 3 1/2 ton and believe that rudd only made 2 ,3 , 4, 5 , ton coil is this right


It is a 3.5 ton air handler and without knowing for sure about Rudd only making those sizes which they should, they more than likely would have gone up to a 4ton coil. One way to cross check this, is to see what ton the condenser outside says it is. If you have a 4ton condenser, then you should have a 3.5 to 4 ton coil, either being okay. What you don't want, is a 3 ton coil and a 4 ton condenser and so on. A half ton isn't going to be a problem regardless, but if anything, you can always take the measurements of the coil if you are trying to replace it.

Feb 03, 2010 | Ruud UAMB042 Air Conditioner

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We have a brand new 5 ton ac unit the part that goes outside how we got it is a long story but a good one but we need to but the other half that goes in the celing and idea how much this should cost me and...


This is called an "A" coil. You need a 5 ton "A" coil to match your outside unit, give or take 1/2 ton. The cost will vary greatly depending on the make of your unit.

Sep 29, 2009 | Heating & Cooling

1 Answer

Air handler


yes and that's dangerous as fumes and exhaust may enter the house

Mar 11, 2009 | Heating & Cooling

2 Answers

Carrier air handler tonnage?


That is a fairly large difference. It is usually ok to have the inside evap. coil and blower up to 1 ton larger than the outside condenser. That will make the unit slightly more efficient as well as less likely to freeze up on low airflow situations. It is not recommended to install a new condenser on an old evap coil. There has been a lot of changes to the design of the coils in the last little while. For example a 10 year old 2 ton coil may only have 3 cubic feet of volume but a new 2 ton coil may have 4 cubit feet of volume.

There are many factors that may have infulenced the decision on what size condenser to install. Many of which can only be done by visiting the home and doing alot of work, checking the duct sizing bioth supply and return, inspecting the insulation and windows of the home etc. etc. Most of the time that never gets done. You can blame the contractor for not doing a complete check, but at the same time you can blame the customer because many contractors that are that good loose the job to a cheaper bid that did not no any of the research. It is a catch 22 for everyone involved.

There is ALOT more to sizing equipment that many people think, sadly that also includes many HVAC contractors. Way too many people use "rule of thumbs" or flat out "guess".

Sorry for the rant but your queston can only be answered by a good well educated HVAC contractor visiting your home. That type of a contractor is getting hard to find these days in such a price competetive world.

Oct 14, 2008 | Carrier Heating & Cooling

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