i have a cental air and heating system and when it is on heat it throws the main breaker after 10 min.?

Question

i have changed the sequincer ,coil, relay, breaker and the thermostat if you leave it on 70 degrees it will cycle some times but most of the time it throughs the breaker

Answer 1

If it has electric heat pack install one or all the heating elments are shorting out on the inside of the air handler,causing breaker to trip.Just ohm through each heat bank,if good check to see if breaker is size right.check spec. plate for breaker size.
now,if it is a gas heater you are speaking about,it can get a alittle harder to figure out,the blower motor can being drawing to many amp and slowing tripping breaker,(check amp draw)again check spec plate for amp draw.Another idea is that some thing else is using the same breaker,this isn't good.the heater needs its on breaker sole for itself, atleast an 20 amp breaker.it would be nothing like clogged air filter or vents cause the heater would be off on limits not a tripped breaker.hope this help you.

Answer 2

not sufficient information the following, is it a vented or unvented device, do you've room thermostat and cylinder thermostat? Is there a seperate vent (closable kind) on the vent pipe on the cylinder, do you've a bye regulation 30 equipment on the header tank (once you've a feeder tank for the heating, and by no potential only a wide one which does both heating and warm water), if not, is the vent pipe sparkling (pipe is going severe of the feeder tank), is the device microbore? did you run a cleanser by the device formerly draining? did you turn the chilly water on finished to re-fill the device? Bored yet? There are extra motives than sufficient why the device does not fill, for this reason the reason it isn't in a good number of cases a very good idea to clutter with it in case you do not thoroughly recognize it! Sorry, yet you reside information!

Answer 3

Sure the heat elements cycle on 1 at a time to full on ? If they all come on at the same time -- this will overheat the breaker. Check the heat elements are not grounding out to frame. Has the heat elements been replaced ? Are they the proper wattage ?

Answer 4

it for some reason is drawing to many amps. Look on the units label and see what it says for amps. one tons usually 20 amp 2 ton usually 30 amp. then look at wire to see what guage. If it is a 30 amp unit you should be running #10 wire. also if the unit is quite a distance away you will have voltage drop which would require you go to a larger wire to compensate for vd. If you are not qualified to to this have an electrician or someone who is look at it and they will take a reading on the amp draw the unit is asking for.. If breaker and wire are ok and in good condition then start looking at unit itself.

Answer 5

sounds like you have a heating coil shorted out (broken). Less resistance higher current = tripped breaker. It has two stages, low heat is fine, high heat is broken

Answer 6

Sounds to me like the blower motor is drawing too many amps for whatever reason. May need to be oiled or replaced. Could also be the filter is clogged or vent pipes clogged causing the motor to work too hard.

Answer 7

you don't say if the furnace is gas or electric.

if electric, an element could be shorting out or the breaker is worn.

if gas, could be the fan motor is drawing more than is required.

Answer 8

You may need either another additional breaker or a bigger breaker to offset the power.

Answer 9

Needs it's own breaker. It has something else wired in with it.

Answer 10

You better have a licensed electrician look at it. Your system appears to have a short somewhere and you don't want to burn the house down,do you?