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My B1100s blows fuse when I turn on heater

I have tested the elment it ok I have even removed elment and turn it back on and still blow breaker?

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  • Dometic Master
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Might be weak breaker or short in wireing.

Posted on Aug 18, 2015

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Posted on Jan 02, 2017

SOURCE: i have a duo therm

That unit has a thermostat I believe and 12 or 24 volts to power it. The 3 amps tells me it may be either line or low voltage, see manual. the fuse blows due to a short in the control circuit, a transformer if low voltage.

Posted on Sep 13, 2011

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2002 venture heater fuse blowing out


You may have a bad resistor or blower motor, a quick test would be to remove the connector from the blower and then turn key on and turn controls to all blower speeds and if the fuse blows then resistor is bad, if the fuse does not blow then reconnect the blower and try the settings again and if fuse blow then blower is bad. good day

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Hatco c-9 booster heater won't heat, 1 amp fuse keeps blowing


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My whirlpool dryer LEB6300l0 dose not heat up .....


Hello there
Please check the following items that i have listed below
Heating element Often a dryer heating element burns out, but doesn't trip the circuit breaker or blow a fuse. The heating element is simply a long coil of special wire. You can check it for continuity with an ohm meter. No continuity means the element is bad and you need to replace it--electric heating elements aren't repairable. Thermal fuse On many dryers, there's a thermal fuse mounted to the exhaust duct inside the back cover panel. The fuse--which is about an inch long--is usually embedded in black resin and mounted in a white plastic housing. If the fuse has blown, you need to replace it. (You can't re-set it.) Wiring A common problem is for the main wiring connection from the house, at the dryer, to burn and break its connection. Because the dryer can still tumble with partial power, the connection may be only partially defective. You may need to replace both the power cord to the dryer and the terminal block inside the dryer that the wire is attached to.

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1 Answer

OUR WATER HEATER IS BLOWING FUSES ..


1) Turn off power before touching water heater that is shorting or wet or was flooded.
2) Circuit breakers & fuses blow because of heat. A short will cause heat. Tighten screws on terminals inside box, listen for crackling sound/burning smell from loose-fitting parts.
3) Easy test for circuit breakers: move water heater wires to another same-size breaker. If same-size does not blow, then problem is breaker.
4) A short between fuse box and water heater could be gnawed electrical wire. Inspect wire.
5) Wires have size markings. 5500 watt water heater needs #10 wire. 4500 watt water heater needs #10 wire but can work with smaller #12 if distance is not long. See label on side of heater for wattage, voltage, etc. Element wattage is water heater wattage even with 2 elements.
http://waterheatertimer.org/Figure-Volts-Amps-Watts-for-water-heater.html
6) Short inside water heater can be elements or thermostat. Open covers and inspect parts for burning. Screws should be very tight against copper wire. Sediment could fill bottom of water heater cause lower element to short.
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http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

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3 Answers

Heater blower stops working


Hmm, a problem that I have not encountered before. My best guess is that some component within the heater setup is getting overheated and then it shuts off to avoid further damage. If the heater runs each time you start the car and then turns off during your travels, then this might be the case.

Secondly, there are circuit breakers located in the fuse box. These are silver and are about twice the size of a standard fuse. Unlike a standard fuse that blows once and is done, circuit breakers get hot and "trip". After they cool down the connection is made again. Look to see if a circuit breaker (sometimes labeled CB) is in the fuse box and serves the heater. You may want to get a new one.

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2002 F150 SuperCab Power Windows via 5A radio fuse. Wierd!


The location for the circuit breaker is in the fuse box under your hood number 601. Its a 30a CB.

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When I turn the airconditioner on or the defrosters, the heater/airconditioning fuse blows? Any thoughts on where to start looking?


Problem is in the a/c circuit. Any time the defrost is on the a/c compressor will cycle on & off as it is used to dehumidify the air directed to the windshield. That's why the fuse can blow even in defrost mode.

Unplug the power connector at the a/c compressor and see if the fuse still blows. If not, then with a dmm or vom test a/c clutch winding for short. If ok, then test clutch diode for short. The diode is usually mounted at the clutch winding, but I've seen Chevy's with a diode that plugs into fuse/relay block under the hood. I have replaced these so don't overlook it.

If fuse blows with compressor unplugged then first check circuit between compressor and a/c relay (power side) for a short. It's possible for the wire to rub a bare spot in the insulation along it's travel along the block, bracket or manifold to the compressor. If ok, then test from relay (winding side) back to switch.

Good luck.

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remove the back panel,you will see the heater box,the fuse which turns the heater box on is at the top of the heater box,replace that and it should work,most of the time what blows the fuse is cloogged wall or dryer vent holes-mike

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I would disconnect the heater element.When you turn the unit back on and all is ok the element is bad if not the pump motor is your problem.

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