Tip & How-To about Heating & Cooling

I need to replace my ac but my furnace works fine. Do they need replaced at the same time?

Think of your air conditioner and furnace as part of a total system. That system will work better, longer and more efficiently if all of its components are matched in capacity and efficiency. By the same token, a mismatched system-one that mixes old technology with new-could decrease system performance and overall comfort.
For example, your new air conditioner will be capable of reaching a certain SEER efficiency rating. Because SEER is determined by a complete system combination, if your existing furnace and indoor coil are older or don't match in efficiency and capacity, you might not get the efficiency level you paid for or be able to receive accurate information on what your rating actually is. Plus, an older indoor coil may even be dirty and clogged with particles, meaning more energy will be required to push air through the system.

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My furnace constantly turning on every 5 to 10 mint.and my bill is high what can I do


You don't indicate whether it is a gas or an electric furnace, so its somewhat difficult to give other than a generic answer. First and foremost, you have to make sure the furnace is working to its utmost efficiency. If it is an electric furnace, one or more of the individual heating elements could be not functioning correctly, lowering the furnace total output which in turn has to run longer to produce the amount of heat required to satisfy the thermostat setpoint. Of course, the lower the outdoor temp, the longer the furnace has to run to maintain the indoor temp setpoint because the loss of heat is greater with the lower temperatures.

If it's a gas furnace, its either working or not, but there are some cases where the gas control refuses to pass full flow of gas. This is a very rare situation, and I doubt that is what is happening. Either furnace needs to have a clean filter to maximize its output.

Check around doors for leaking door gaskets or leaking threshhold gaskets. Check around the windows for air leakage. If you have a gas furnace and its not a high efficiency unit that draws air from the outside from the second of two pvc pipes, the furnace has to draw
'combustion air' from within the house. That air mixes with the gas, then escapes the house up the flu. The result is that that air has to be replaced, so the slightly negative air pressure INSIDE you house is replenished by outside air seeping in cracks and crevases around doors and windows.

Its a law of physics, pressure will flow from high to low and when this happens, you may feel a draft around the windows. You can't totally seal the house as a certain amount of fresh air is required for a healthy environment, but excess leakage needs to be eliminated.

Jan 10, 2015 | Dayton Gas Furnace Heater

3 Answers

heat pump is not kicking in no heat at 42 degree outdoor temp


check the wirings.the coils and also the heating element.also check the heating temprature.
also check the power outlet.
connect some where else.
and try to restart it again after five minites.after you unplug the device from the electric outlet.

Oct 10, 2008 | Amana PTH123B35AE Air Conditioner

1 Answer

My Maytag 90% plus funace you can only feel a slight air movement coming out of the ducts. My 80% one at home I could dry my hair from the vent. What is wrong with my 90% unit? should the air movement be better than nothing? It takes forever to heat or cool the place. Always running


First check to make sure that you furnace filter is not plugged. Now with that being said your furnace may be working exactly as intended if the motor is staged. The way a high efficiency unit works is slowing down the fan speed to maximize heat transfer from the coil.

My guess is that your furnace is working correctly (if filter is not plugged).

Jun 16, 2011 | Heating & Cooling

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