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I HAVE A NEW FURNACE THAT WORKED FINE FOR 5 MONTHS AND THEN SUDDENLY THE AIR CONDITIONING NEVER WOULD GET TO THE TEMPERATURE IT WAS SET TO AND NOW THE FURNACE IS SET ON 70 AND IT TURNED OFF AT 61.

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Hello my name is Heath it will be my pleasure to assist you. It sounds like the thermostat is the issue check the wiring to the thermostat.

Posted on Oct 06, 2010

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Posted on Jan 02, 2017

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Am I able to adjust the 'hysteresis' of my digital thermostat?


Some thermostats allow you to change the differential value - that is how far below the heating (or above the cooling) set point before calling for heat (or cooling in the case of air conditioning). The built in 1 degree differential setting provides the most even temperature in the space at the expense of more frequent furnace firing and stopping. Many people prefer this mode as opposed to allowing wider swings in temperature for less frequent furnace firing and stopping. If you wish to change this setting, you'll need to replace the thermostat as it is not user adjustable in this model.

Nov 02, 2015 | Honeywell RTH6350D1000 5/2Day Prog...

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

on Aug 09, 2010 | Heating & Cooling

1 Answer

Why is my heating system short cycling?


What is your Temperature Rise across the furnace? Match this with the name plate. This tells you a lot. Is the t-rise higher or lower? If its higher, you could have restricted airflow or exhaust issues. If its lower, could be gas pressure or duct work problems, pulling in colder air somewhere. More info is needed to help. I am assuming the furnace is operating continuously when you say it will not heat over 66 degrees?

Feb 16, 2015 | Heating & Cooling

1 Answer

Why heater fan will not come on?


Wish I knew how old your furnace is. Let me answer your question directly. In the heat mode the fan runs independently from the air conditioning fan relay. Its either brought on by time or temperature. An old furnace will use a fan and limit control that uses a coil to sense the heat exchanger temperature and turn the fan on or off. Newer furnaces use a timer on a circuit board. 20 years or newer Ill bet its a timer board. Follow the blower motor wires back to the component and ill bet that's the culprit. Hope it helps. Good luck.

Oct 12, 2014 | Heating & Cooling

1 Answer

Fasdfas


Does the furnace stays off?.
Furnace are ment to cycle on and off because of limits .If you set to 70 furnace would cycle several times before reaching that temperature.
Just make sure your filters are clean and you got proper return air flow because lack of air flow will cause furnace to shut off sooner than normal

Jun 08, 2017 | Heating & Cooling

1 Answer

Hello, My thermopompe model is VBHC 21J18SFA. I have it fo 5 years (new). The thermopompe seems to work fine. But the temperature does not cool down to what I set to be. Inside temperature is at 28...


Check your filter make sure it is new and not clogged with debre. If thats ok you have a refrigeration leak in the sytem most likely. Have a pro take care of it. Its not a DIY project let me know if I can further assist

Jul 23, 2011 | Ruud UBHC Air Conditioner

1 Answer

Just cut on 8 year old Goodman CPLE24-1 AC for the summer. Ran 8 hours fine, Next morning noticed outside unit running, very little cool air blowing out of inside floor vents (like the blower fan was...


Due to the many different questions I see about Air Conditioning, I am including this overview to help us better understand each other for trouble shooting. A basic air conditioning system has a Thermostat, Air Handler or Furnace Fan and a Condensing unit. In a split system, the condensing unit (Condenser) is separate from the furnace and usually in the back yard. When working properly, it blows hot air. It connects to the cooling part of the system by 2 copper lines. One large line and 1 small line. The part that cools the house is the "Evaporator" and is usually on top of the furnace inside the square metal box (Plenum). When the Air Conditioner is running, the large copper line should be cold and the smaller line should be warm. Common signs of low refrigerant are that both lines are the same temperature and/or frost or ice has built up on the large line at the condenser. The thermostat will normally display room temperature on till it is touched to change the setting. It could have a "Span" setting as well as times and temperatures. The operating "span" of MOST residential thermostats is 40 to 90 degrees. That means you can set it as low as 40 degrees and no higher than 90 degrees. It probably has a fan switch also. When in the "ON" position, the fan will run constantly, 24 / 7, but the condenser will still cycle on and off as needed to keep the house at set point. If you have a suggestion to include in this paragraph, please let me know.

I think I have it covered above. Let me know if you need something more specific. Thank you. Roger

Apr 12, 2011 | Goodman CPLE24-1 Air Conditioner

1 Answer

We had our furnace replace this winter, our air was only about 8 years old and working fine so we didnt change it, well now , the air coming out of the vents are cold, but the condenser NEVER shuts off and...


Hi, if the new furnace they put in did not have the right size coil to match the outdoor unit, it would run all of the time and not cycle off. Lets say if it is a 3 ton condenser, the indoor coil must be a 3 ton coil as well. If they put a 2 !/2 coil in, you will have problems. You can try replacing the stat, but I don't believe this is the problem. If the pressures are good, freon is good, take a thermometer and do this. Check the temperature coming from the vents coming in. Write it down. Check the return air where the air is going out at the filter. The temperature should be between 18 to 25 degrees F.This is called your T.D. If it is below 18 or above 25 you have a problem with the way they installed the furnace. They may have reversed the coil also. Call them back out until you are satisfied!!
Sincerely,
Shastalaker7
PS Keep me posted on this please. You should have a 5 to 7 degree split or T.D. on the entering air and return air.

Jun 11, 2010 | Heating & Cooling

1 Answer

Relatively new wall furnace suddenly stopped working.


if you are by passing stat at the gas valve and it is still not working,i would assume a bad control valve.

Jan 13, 2010 | Heating & Cooling

1 Answer

Heat temperature issues with Goodman GMP 100-4 furnace


69,000 btuh is adequate for a 12-1400 square foot house.
Otherwise, your thermostat simply tells the furnace to cycle on/off.
If it calls for heat and does not come on, the problem is with switches and relays within the furnace.
Your setting the temp higher only causes the other parts to keep trying until they finally light and heat.
This is based on your information saying it will cycle on and blow cool air--not hot air.
You will have several temperature variations from floor to ceiling.
You probably have ceiling vents as well.
You need a technician to verify the rollout switches, fan relay, inducer fan etc. if the furnace is not firing everytime you call for heat.

Feb 21, 2009 | Goodman CPLE24-1 Air Conditioner

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