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My monthly electric bill is huge.. am thinking that it might be my furnace is not set properly? (true or not?) usually keep it around 68. Seems like its in an 'auto' mode (which might make sense), but since i have both the heat pump and an oil furnace (serving as aux heat), am thinking that i might be better served if the oil were being use more when it gets colder? (true or not?) how do i determine and set the temp levels so that my aux heat will kick in if the outside temp falls below 40 degrees? According to one sheet of instructions i have on the unit, it appears that there are three ways to set the 'Balance Point Temperature'...(capacity, Economic, and Comfort)... how do i figure out what it is set and what is the best way for me to set it for both cost and comfort (I live in Maryland where we have mild winters...not the heavy cold weather that New England gets). I believe that i have a thermostat similar to: http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/omtstat-1.pdf

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Typically electric resistance heat draws three times the amount than a heat-pump be sure to not set the thermostat too high, its possible the sequential heater relays arent shutting off continually on without the blower causing super high electric bills

Posted on Jan 21, 2009

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WHY DOES MY FURNACE SHUT OFF BEFORE REACHING TEMP


Hi Demetrio
Furnaces turn on and off based on what they're told by your thermostat. The thermostat, in turn, will control the furnace based on:
  1. The temperature AT the thermostat.
  2. What the internal heat sensor thinks the temperature of the air is.
So, if your idea of 68 degrees is what the thermostat thinks is 71 degrees (thermostat reads three degrees high), then when the air by the thermostat gets to about 65 degrees (by your account), it'll think it's 68 degrees and shut the furnace off.

Also, if the thermostat is, say, near a source of local heat, like a lamp, a big piece of electronics, a fireplace, or that place that you habitually set down your coffee, then the air right next to the thermostat may be warmer than the rest of the room, and fool it into thinking it's at it's target.

The sensor is usually inside the housing for the thermostat. If it hasn't been dusted in a while, then it can be hard for air to get inside to affect the sensor, though this would generally cause it to lag on readouts and run the temperature higher than you wanted.

If you have a digital readout, and the system is saying , hey, target is 68, and the readout gets to 66 and the system cuts off the furnace.... my only other guess is that the unit may have features that are trying to prevent overshoot - i.e. by the time the temp at the thermostat actually gets to 68, most of the room is more like 73. That'd depend on your particular thermostat. At that point, you may want to call customer service with the manufacturer and tell them the issue. There may be ways to adjust the unit to get behavior closer to what you seek.

Good Luck!

DH

Jan 25, 2016 | Heating & Cooling

Tip

2 Stage Furnaces More Comfort and Save Money


Two stage hot air furnaces can save you money and make your high efficiency furnace even better. With your furnace running at low fire instead of cranking up to the highest heating output in mild weather you can be more comfortable while saving money.

Many people think that they are getting the best they can get by buying a high efficiency single stage furnace. What they often don’t realize is that they could do better yet and for a few dollars more have a high efficiency 2 stage furnace that could keep them much more comfortable.


There are 2 stage hot air furnaces that are now available that will only run at half fire if the full fire is not needed. With a two stage furnace in mild weather when only a little bit of heat is needed, the furnace will have longer run times on low fire. This will keep you room temperatures from getting too hot before the thermostat reacts and shuts the furnace off again. This will help to keep your temperatures from overshooting the set point and help to keep your home much more comfortable.

Many of these two stage furnaces also have variable speed blowers that run at a lower speed when heating on low fire. This will also help to save money on your electric bill, because these blowers use very little electric when running at these low speeds. Air noise from the blower running at a high speed is also reduced.

If you are thinking of replacing or installing a hot air furnace, make sure that you ask your contractor to give you a price on installing a two stage furnace. The price difference probably will not be much higher than a high efficiency single stage furnace. However the comfort of the two stage furnace coupled with the electric savings will make the extra money well worth it.

on Dec 14, 2009 | Heating & Cooling

1 Answer

Gas furnace; flame will not stay on


Clean the flame sensor with a green scotch brite pad. Check all ground connections from the circuit board to the furnace cabinet. Check for a proper ground to the electrical box. Make sure polarity has not been reversed.

Dec 26, 2009 | Coleman Heating & Cooling

1 Answer

Urnace fan of some sort runs all the time - set on automatic


If you have it cleaned twice a year they should be able to find this problem. It is one of two thinkgs. There is a limit switch on the fan at the top (inducer) this may be weak and causing the inducer run frequently. The other is there is another limit switch it is a main limit on the fire wall it is also weak and that is why the main blower is running it is trying to cool that limit.

Jan 26, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Extreme heating bills


easy way to fine the high usage is to turn everything off and watch your meter and have someone start turning thing back on and watch for the most usage of power

Jan 25, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Fan in furnance


any furnace with a blower will go on your electric bill but it really should'nt draw enough power to raise your bill noticably unless it's running constantly.

Jan 24, 2009 | Coleman Propane Forced Air Heater...

1 Answer

Forced Hot Air Heating system doesn't maintain thermostat setting


It sounds like you may have issues with the furnace. A qualified professional can go over the system and the house to let you know if the system and unit are properly sized. The poor performance of a furnace can be a sign of carbon buildup in the furnace.
Good luck, hope this helps.
Matt

Jan 10, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

Won't go past 68...


Be sure the filter is new and clean
Check Chimney/vent to be sure it is not plugged or iced up.
Also if it has a drain be sure it is not kinked or plugged and draining correctly

Dec 22, 2008 | Dayton Gas Furnace Heater

1 Answer

I have a gmpn-80 janitrol 90% eff gas furnace,it is only 15 months old,my condisation tray is melting and cracked do to heat in which case leaks water all over....why would this be happening?


Most likely the cause is that the furnace is firing too hot. When a furnace is installed and set up, the manifold gas pressure and fan speed has to be set by the technician so that the temperature rise through the furnace is a maximum of 50 deg F (i.e. if air enters the furnace at 68 deg F it come out no hotter than 118). The target temperature rise on any gas furnace is anywhere between 30 and 50 deg F. If the furnace runs too hot, either the manifold gas pressure must be turned down or the fan speed must be turned up to keep in this range.

Jun 28, 2008 | Heating & Cooling

3 Answers

Furnace runs all the time


Um Yeah IF its that cold out then of course its goona be runnin like crazy, I mean its sucking the heat out of your house like crazy when its that Freakin cold. I suppose its set a 68deg or warmer???

Jan 19, 2008 | Heating & Cooling

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