My family has just moved into a doublewide. When I had power turned on I asked
for an average power bill. Now that we are living here power bill more than
doubled and I've noticed that the heat comes on like it should but the blower
stays on for a long time after. I'm not familiar with any hvac system. Just
curious of what I can do to check this out if anyone could help
It's supposed to stay running until the furnace cools down.
At any rate, having the blower run for a few minutes longer that you'd
expect is not the reason your bill doubled. The power company's initial
estimate was simply wrong. They expected a warmer winter.
On Tuesday, March 18, 2014 2:47:04 PM UTC-4, philo wrote:
Cutting off with a limit switch is not as common any more. Most just use a
delay timer circuit on the control board. They only use high limit switch
es for safety. If the fan stays on until the power is shutoff then I'd sus
pect the fan relay on the control board is getting stuck.
On Thursday, March 20, 2014 4:30:37 PM UTC-4, jamesgang wrote:
a delay timer circuit on the control board. They only use high limit swit
ches for safety. If the fan stays on until the power is shutoff then I'd s
uspect the fan relay on the control board is getting stuck.
Agree. It depends on the vintage of the furnace. IDK when they went
to the timer based approach, but it's been a long time. Finding an
install manual or following the circuit diagram that should be on the
unit itself should show how this one is done.
Not enough information. Where are you located? Is this for electric
heat? Whgat was the thermostat set for? The cost for electricity varies
from about 7¢ to 19¢ in this country and temperatures in the past two
months have been -30 in Minnesota. In January, a $400 bill is very
common in some places, high or low in others.
If it is 30 below, it may have to run constantly to maintain
temperature. If you are in Florida and it is 55 outside, it should warm
Either of the other two could be the answer or partial depending on what
it was the PoCo gave you as the "average".
I'll note that if you're not used to forced central heat one real cause
of loss of efficiency can be severely blocked filters. If you've not
checked/cleaned/changed them, better take a look and see.
The blower for the heater is controlled by two limit switches. One
senses the low end, the other the high end. The burner comes on and
start to heat the air. One it gets to a certain temperature, the blower
starts. When the thermostat say the heat is enough, it shuts the burner
off, but the fan keeps going until the heat exchanges has cooled down
enough. The set point is adjustable, but before playing with it, find
out what the acceptable range is.
Check the blower for other potential problems. Are filters clean? Are
the registers in each room opened at least partially for good
circulation? If you are not familiar with this, have a pro come and
check the system and instruct you in normal care and operation.
There are many other factors with the bill and the comparison. What
fuel do you heat with? Size of family as compared to the previous
owner. Number of people (and the associated laundry and cooking),
number of electronic devices.
I recall my paternal grandmother sitting alone in one room of her house
with a 40 watt bulb and no TV. Her bill would be a lot less than anyone
I know today.
That, BTW was a pro rated bill and not for a whole month...but still
the monthly bill would have been well under $10.
That was 1968 and I don't recall the minimum wage ...but I got my first
job in 1964 and was paid $1.10 an hour so by 1968 it could not have been
I was at MSOE and all students from out of town under the age of 21 were
required to live in the dorm. The guy who's name is on the bill had been
through the Army and was a few years older. He took out the efficiency
in order to give a bunch of us a place to go and drink beer and have
conversations with women.
We were supposed to pay $15 a month for beer, the use of the apartment
and a 1959 Ford. I only paid once and was never asked for money again.
The actual rent was $60 a month.
It's long ago been torn down and condos built. I looked up that address
and saw the condo sold for half a million dollars. I bet the gas bill is
twice as much now.
My 'lectric has been a bit high , water quite high because we have to keep
a faucet dripping , but propane usage is way down . I've probably burned
around 2 cords so far this winter ... and my pot belly is gone . Chainsaw
and splitting maul will do that ! I'm currently working on the trees that I
dropped to make a clearing for our new orchard . Most of that will be used
next year , I don't expect that much more cold weather this year .
When the thermostat in our triple-wide was replaced a few years ago, I
had the tech turn on the option to run the fan for 90 seconds after the
heat shuts off.
Does your place have a programmable thermostat?
You also have to count the return that he didnt' geton another 150,000
investment over the last 10+ years as an expense to him. At only 5%
that 2250 a year straight interest. More when you compound it.
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