My furnace keeps going off even though I have it set to hold the temperature at 70. This will happen randomly with it working for a while and then it goes off and the temperature in the house drops to 65 or lower. If I go to the fuse box, remove the 15 amp fuse and then put the same fuse back in, the furnace starts up again immediately and the house gets warm again. It is a standard 100 amp service to the main box. This has happened about four times over the past few days. I will really appreciate any and all serious answers - thanks very much in advance.
2007-01-25 10:08:08 · 11 answers · asked by wd2crv 3 in Home & Garden ➔ Maintenance & Repairs
Hi,
You may have a defective "thermocoupler', 6-8 bucks, easy to replace or may be your thermostat's been bumped off being level, and or your thermostat's "anticipator" needs to be adjusted for a more wider range of operating temperatures.
You set it for 70, okay, but your furnace should kick on about 68, then shut-off at about 70/72 degrees.
If you thermostat is set to "close", in degrees, the furnace won't know what to do, the air is always changing by the thermostat while in operation, it gets a false signal.
Have you just replaced you thermostat?
Hope this helps,
Dave
Another thought just came to me.
If your furnace hasn't been cleaned in awhile, your "blower motor" could be "kicking out" because of over-heating during operation.
This is designed into the motor to protect it from damage.
It might need oiling and/or blowing out of crud and such
Once your blower motor cools off, it will reset and run.
If it's dirty, it will keep tripping off from over-heating until the solution is corrected.
2007-01-25 10:23:58 · answer #1 · answered by what'sthis4 4 · 2⤊ 0⤋
Your furnace is cutting out due to safety precautions built into the electronic control. What you do by removing and re inserting the fuse is to "reset' the electronic control.
There are a few reasons for this on a furnace. It can be the "high limit" or the "flash back" or a number of reasons.
I would first do this. On the regulator is a cap and screw setting for the gas regulator pressure. It should be marked such. Remove that cap. Deep down in that hole you will see a screwdrive slot. Go 1/2 turn counterclockwise on that screw. Then replace the cap. Nine times out of 10 this cures a lot of ailes on a problem such as youve described. Good luck Ben.
2007-01-25 11:43:54 · answer #2 · answered by James M 6 · 0⤊ 0⤋
I'm guessing you don't have forced air heat, but water or steam radiators- right?
To keep the house more even temp, a fan blowing air around the room where the thermostat is sometimes helps.
Make sure there is enough water in the system or it won't heat evenly/ properly and could do what yours does. If you have an old system there might not be an auto-fill, but you have to turn a knob on to fill it.
I bet if you just turn the power off and dont touvh the fuse, but turn the power back on, the furnace restarts. Not related, it just detects that it's below 70 at that instant and restarts- it's that rangething.
2007-01-25 10:30:00 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I thought I might know the answer until l read about the fuse. I will share our furnace story with you anyway, in case it helps. Ours would start and run and get the temp up where it was supposed to be and then shut off. After that, it wouldn't start again when the temperature dropped. I called our servicemen and they cleaned our furnace and it's worked perfectly ever since. They said you should have your furnace cleaned once a year, right before winter. Hope this helps.
2007-01-25 10:15:18 · answer #4 · answered by Anonymous · 0⤊ 0⤋
try not putting the same fuse in the fuse box,try a new fuse then you will know that the problem isnt or is the fuse box,some furnaces require lighting which is normally located at the bottom of the furnace,try these and come back
2007-01-25 10:44:20 · answer #5 · answered by poet 2 · 0⤊ 0⤋
The fact that you are asking this question tells me that you are not a furnace tech. Niether am I. By pulling the fuse and re-seating it; you are effectively 're-setting the defaults and the furnace fires up again. This tells me there is an issue within the electronics of the furnace that is effectively shutting it down... probably for safety (heat/overdraw electrical...) reasons.
Please call a tech and get it fixed right.
2007-01-25 10:15:43 · answer #6 · answered by 6kidsANDalwaysFIXINGsomething 4 · 0⤊ 0⤋
even though you set it for 70, there is a range of temperature it will hold. otherwise, it would cut off and the next second cut back on.
my guess is when you reset fuse, you reset the range, so it gets it to 70.
2007-01-25 10:15:17 · answer #7 · answered by triggy 2 · 0⤊ 0⤋
maybe its the fuse, try buying another one and see if that works. or call a furnace guy, and also change the filter on them.
2007-01-25 10:16:30 · answer #8 · answered by misty blue 6 · 0⤊ 0⤋
very possibly, the limit switch on the furnace , gone bad. is cheap and simple to fix. a high limit, limit switch may be it
2007-01-25 12:15:10 · answer #9 · answered by mcdougle 2 · 0⤊ 0⤋
Like the rest of the guys told ya ... clean up the flame sensor and you should be all good.
2016-03-29 02:36:30 · answer #10 · answered by Flor 4 · 0⤊ 0⤋