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Replacing TSTAT for my Goodmans 3 ton heat pump. Only question I have is optimal setting for AUX heat CPH .. I think 5 or 6. ????

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5 will be the most economical CPH means cycles per hour . So the thermostat will only let the heat strips come on 5 times a hour. You should not need the aux heat except on the coldest days.

Posted on Nov 30, 2008

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I installed a goodman 5 ton heat cool unit and a 5 wire battery operated tstat, the unit is 2 stage will it work with this tstat cant get anything to work even jumping the tstat


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Nov 15, 2015 | Goodman Heating & Cooling

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Had 16 xi Trane heat pump installed 3 years ago. It ran well for the first couple of years. It began to stop heating and would blow cold air only. Have tried both aux heat and reg. heat to run and neither...


That's a complicated system that needs a qualified technician to service it. Lots of people can install them and they run fine, for a few years. Your indoor unit, operating on 2 heat elements, will feel like its blowing cold air even though its heating, just not so well. And not like you are accustomed to. Each element (5kw)=22.7amps, on average. So 3 elements operating should trip a breaker. Its probably been operating on 2 heat element plus the heat pump. And now you have trouble with the heat pump. If you can't TRUST the guys working on your equipment, try someone else. A second opinion. Normally a 3 or 4 ton unit will have 15kw heat installed, heatpump or not. 5 ton, 20kw. If yours is a 3-4ton, cooling, the 100amp(or normally two 60 amp) breaker should have been installed upon equipment change out. If yours is blowing cold all the time, something is wrong with your heatpump. The electric heat inside operates only when the heatpump can't keep up(real cold outside), the heatpump is in defrost(then it's actually in cooling mode), or if you have the tstat in aux/em. heat. Try a local trane dealer? Of a technician with 15-20 yrs under their belt. A trane dealer should have trane tech support also. BIG HELP!!!

Mar 01, 2017 | Haier Energy Star ESA3183 Air Conditioner

1 Answer

Just installed Honeywell RTD7500d thermostat to replace Batstat239 (which seemed to have faulty temperature gauge - it would keep pumping both hot and cold past the set point indefinitely). I followed the...


Wiring seems right, but it needs to be wired like the original tstat. Meaning if W was connected to w1 on the old, that's were it goes on the new. If it was on aux heat then your wiring seems correct. If its operating the aux heat "on its own", then that's were your issue is at.(?) Also, there is a configuration menu in the new tstat. It needs to be set up for your system, heat pump, 1 cool, aux heat or 2 heat 1 cool, O should engage the reversing valve(RV=O). If you didn't write down or pic what you started with, it will be tough for you, and us, to wire your unit correctly. And there is no factory installed fuse on the outdoor. The indoor will(should) have a 3 or 5amp "blade" fuse, (car fuse but not the new smaller style, the 80's to 90's style). Its on the indoor circuit board. Hope this helps!

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I have a new York hybrid heat pump/gas furance


Did they check the sensor in the plenum. You are suppose to have bonnet sensor to switch from heat heat pump to gas whaen it is to cold for the heat pump. The bonnet sensor may be to bad. The unit is cycling ever five minutes because it may have five minute time delay.

Dec 15, 2009 | Honeywell Programmable Thermostat Heater

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Hello, I have a 1.5 ton rudd ac/heat pump


Your outside unit is not defrosting. You need to call a service tech to check it out. Defrost board sensor or low on gas. Also you amy have an outside tstat that is not working correctly. Rus

Dec 06, 2009 | Ruud UAMB042 Air Conditioner

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I only have two settings. Which is which and how so?


I think you probably have a heat pump. Aux heat is electrical resistance heat coils that produce heat when the heat pump can not produce enough to keep the temperature up (caused by low outside temperature or a problem with the refrigerant system). This resistance heat can be switched on by the emerg. heat button. It also can come on automaticlly (sp) and will be indicated by the aux being shown on the thermostat. Sometime if you set the heat up several degrees by thermostat the aux will come on to help the system catch up to the desired temperature setting. The emerg. heat is a way to turn on the AUX manually. If you do not have a heat pump system then it is possible that you have a heat pump thermostat installed on a non heat pump system. Emergency heat and Aux are both the secondary.

Hope this makes sense1

Bob

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Compressor size


Square footage is how you determine what size of an AC you need, say two bedroom house with 1500 square feet would require a 3 ton unit but I would go to a 4 or 5 ton depending on brand and what you may do in the future, Like adding a bedroom or bathroom and how many people will be living in the house, a heat pump normally last longer the bigger it is and is more efficient than a smaller size. Just think like this, a 3 ton will run 30 minutes to an hour longer to cool the same space as a 5 ton so if the five ton does it 30 minutes faster it will not run as long. And when it has to pull down the temperature again it will do it much faster. So less run time means faster heat or cooling and less energy is used. I have found that the bigger units are made better and last longer as a general rule. And to understand the 3-ton and 5 ton let me say that it means how long it takes 3 tons of ice to bring the temperature down 10 degrees, the old BTU’s British thermal units. However the bigger the unit the more well built it is normally and the less maintenance required. 5 tons of ice would get it cooler faster. But one thing to keep in mind a heat pump is only good for 20 degrees temperature range, for instance if the high range is 80 then the low side would be 60 in order for it to be efficient so if you have it set in the house at 72 degrees on the high side and low side would be 52 degrees. But the larger the unit the less time it would take it to recover from the heat differential.

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1 Answer

I have a Rudd ubha and have been using the emergency heat for a couple weeks because the aux. heat won't work. Now I need the A.C. but the unit outside won't turn on. We replaced the control panal and it...


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