Question about Weather King 12AJA6001AH Air Conditioner

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How do i operate thermostat and furnace

Our furnace does not respond to the thermostat setting in a timley manner. At times it has taken approx. 24hr for the furnace to heat the home at the temperature set on the thermostat. I must admit that the thermostat settings have been increase irratically out of frustration that come from not being comfortable. Once the furnae and thermostat cooperate and the heat is adjusted in or home we are ok. We also hesitate to lower the temperatue setting below 70 on warmer days because we always have to struggle with the furnace and thermostat when it is time to increase the heat temperature for fear we may be cold for 24hr in temperatures below 40. Is our furnace faulty? It is failry new only1.5 years old. Or do we need to learn to operate it more efficiently? Last year the service repair man told us not to turn the heat below 70 in the winter time because the furnace will have to work to hard when it is time to turn it up again and that is why we were cold for 24hours last year. But shouldnt we be able chacng ethe setting on our thermostat and not worry about the furnace malfunctioning?

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If your furnace is on 24 hours straight, before it heats up your home, then either your cold weather and indoor temps are extreme, or your unit is grossly undersized. if however your furnace cycles on and off when the temp is still way colder than you have set it you have either a bad stat that thinks its hotter than it is, or a bad furnace problem and even though the furnace is getting a signal from the stat to heat it is failing to do so. you'll have to watch and think this through to isolate the problem. if you set the furnace to max heat and it runs and heats the house reasonably quick then its probably going to be a bad stat. if you set it to max heat and it shuts off way before it gets to setpoint then the problem is in the furnace. be sure filters are clean, blower wheel is clean , returns are no obstructed, etc. if you by chance have an old mercury bulb stat they had a thing in them called a heat anticipator which basically worked like this. a dial with a little pointer determined how soon it would be till the furnaced reached the desired temp and anticipated how soon to shut off the burners in anticipation of the cool down period so you dont overshoot the desired temp. if these are bad or moved to different setting they can short cycle the furnace on of on off etc. or shut down the burner almost as soon as it lights. setting is usually at .4 to .6 on most, but really a digital stat is only way to go. by the way check to be sure you don't have a hot air supply grill blowing directly on the stat or it will shut off as soon as stat gets hot and rest of house will be cold. usual location is 5 feet off floor directly over the main return air grill or under it as the case may be. good luck

Posted on Nov 12, 2008

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