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How do i check the thermo fuse with a voltmeter. i get 120 with top wire removed and zero with the bottom one removed

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Hi

Please disconnect power before checking the thermofuse. Now use a Multimeter with R X 1 scale and touch the leads to the thermofuse terminals to test for continuity. If you get an infinite reading, it means the fuse has blown and needs replacing. However if you get reading above 100 ohms then the thermofuse is fine.

Please post back for any further assistance.

Daniel

Posted on Jul 22, 2010

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1987 honda civic


Disconnect the electrical at the top. Sometimes you can get the fan out and then the shroud-due to limited space. They would both come out from the top.
We mechanics will tell you to test the fan motor with jumper wires from the battery before you decide to pull it off. On most cars, the computer turns the fan on through a cooling fan relay. On your '87, it is possible that a thermal switch on the radiator may turn the fan relay on at a set temperature. One would have to see a wiring diagram.

Just looked at a diagram: If your car is fuel injected, check fuse #13, a 15 amp blue fuse. And same if carbureted, fuse #13-this fuse is for the relay and the fan motor. If carbureted, also check fuse #20-a 20amp fuse.
There are no computer controls for the fan on an '87. there is a thermo switch-at a set temperature, the switch will close-completing the ground path for the fan motor. There is also a radiator fan timer switch, tied in with the thermo switch and the air temperature sensor.
Sound complicated? Well, it is, even with no computer controls. If the fan motor is good, check or replace the thermo switch. Be sure and check those fuses, also. If no help, a tech will probably have to diagnose it.

Jan 29, 2014 | 1987 Honda Civic

1 Answer

Estate dryer TGDS840JQ1 does not heat. I've checked the thermal fuse. I'm checking the cycle control switch but it has 4 connectors rather than two. Top and bottom connectors have the same color...


Hello Bob,

The cycle thermostat sounds good to me the two wires on the top/bottom should be zero ohms 1.1 is fine the two across from each other are going to be in the range of 6-8k so they as well are fine. What ya need to check is the heat element itself it should be between 10-20 ohms


Whta you to check also is the 2 thermostats where the tube the burner asm. fits to in the rear of the dryer both of the should be zero ohms resistiance (1-5 would be ok) if you find either of them to be open that will be the reason the dryer isnt not heating

But on the gas dryer the most common thing that will make it not heat is going to be the igniter..need to check it not for ohms but when the dryer is running that their is 120 volts to it,if it has 120vac and doesnt come on the igniter is bad

if the igniter does not have 120 volts need to check the flame sensor(black rectangle peice on the side of the burner tube) for zero ohms before checking it be sure the power is disconnected since it if you touch it live it will shock you

if all above checks good either the timer or the motor will cause the dryer to neot heat as well
but i suspect it will either be the igniter of one of the thermostats on the housing in the rear where the burner tube fits into

Good luck,
GENE

Sep 17, 2011 | Estate TGDS840JQ Gas Dryer

1 Answer

The water in my cuisinart coffe maker DTC 975 doesn't advance, I added water/vinegar mixture and not works yet, can you help me. Thanks.


I provided the following answer for another question about the coffee maker, if you or someone else feels confident in taking the coffee maker apart, this procedure may solve your problem. The water will not move until it is heated. It can be heated if the thermo fuse/s are blown.

If the coffee maker will not pump water, and will not get hot, chances are either one or two of the 240 degree C thermo fuses under the bottom plate are blown or the heating element has gone bad. Unplugged, using a T10 Torx driver, I removed the four screws from the bottom plate. I pulled one of the rubber hoses loose, not from the metal element but from the plastic fitting. I forced water through with a garden hose to remove any beans or other debris in the hose. I put the hose back. I checked the two thermo fuses, both were open, the unit probably ran without water or the filter was plugged. The thermo fuses are 240 degrees C as I mentioned. Radio Shack sells 228 C fuses for $1.79 each, probably close enough. Clip the old fuses out, close to the fuse as possible. Solder in the new fuses, while holding the wire close to the fuse with needle nose pliers as a heat sink as to not overheat the fuse and blow it. Once the fuse cools, solder the other side, again holding the wire next to the fuse. Once both are soldered in, check with an ohmmeter to be sure you did not overheat the fuses. If ok, secure your wiring, make sure nothing is touching, put the bottom back in, clean up as necessary, put water back in, beans as necessary and try it. Worked for me. Most likely cause over the years beans falling into the water and clogging the filter. I'd recommend at least once a year, remove the filter and hose out the water reservoir. Replace filter if necessary. Once the unit runs dry, the elements overheat and blow the fuses. When making coffee, it will use all the water and shut itself off, "normally."

Please understand that you will make this repair with the unit unplugged. If you reassemble the unit incorrectly you could create a shock hazard, make sure none of the bare wires touch anything they shouldn't.

Hope this helps - Not a Guru, just been an electronic tech for over 45 years -

Empirical Technology - emptech - Jim

Aug 23, 2011 | Cuisinart DTC-975 Coffee Maker

1 Answer

Volkswagon POLO 2001 Manual Problem: thermo fan not working. Hi all, I have since ordered and replaced the fan with a another fan and the fan still does not work!! Could it be the fuse? Initial...


CHECK TO SEE IF POWER GOING TO COOLANT FAN AND COOLANT FAN THERMO SWITCH.THERMO SWITCH LOCATED BOTTOM OF RADIATOR ON THE LEFT HAND SIDE.IF POWER GOING TO THERMO SWITCH THEN SWITCH IS FAULTY.IF NO POWER GOING TO THERMO SWITCH OR COOLING FAN.CHECK LARGE FAN FUSE IN THE ENGINE COMPARTMENT AND YOU HAVE FUSE 16 IN FUSE HOLDER.IF FUSES GOOD YOU HAVE SHORT IN THE FAN WIRE OR FAULTY FAN CONTROL MODULE.SHAKE FAN WIRES IF FAN WORKS PROBLEM IN THE FAN WIRES YOU HAVE A SHORT IN THE WIRES..

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1 Answer

I just replaced the heater element in my dryer and it will still not heat what else could it be.


Good day,
It could be many things. The first thing to check is the thermal fuse which is located on the center near the bottom if it is the style with the lint filter on top. It looks like this and should test zero ohms with a VOM meter.

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In addition there are other limit fuses/thermostats located on the back as well. They are either round or squarish in shape. They should all test zero ohms.

If no luck there being very careful, check the voltage where it enters the machine. Left to center should read approx. 120 volts and right to center the same. If only one side went out, the motor is only 120 volts and would run, but would not heat.

These are the common items, but in addition the heat selector switch, timer and wiring could cause the same problem.
If it is the model with the lint filter in the door, then most of these components are in the front.

Oct 30, 2010 | Kenmore 62822 Electric Dryer

1 Answer

The thermostat on my electric baseboard heater has a red and black wire out the top and the same on the bottom. The electrician ran the power wire from the box to both red wires, one on top and one on...


If is 120 volt heater.The thermo can use 220 or 110 volt.The elec is only using the 110v half/side of therm.Should be ok.Does it work?OK to leave blacks unused.

Mar 16, 2010 | Fahrenheat Electric Hydronic Baseboard...

1 Answer

Whirlpool dishwaster quiet partner I - 5 years old


it could be bad thermal fuse or loose wires in jbox at bottom .to chkd therm fuse remove the screws the on top of the door holding the control panel.then pull out the panel and u should see cntrol board on the rhs of the panel.the thermal fuse is mounted on rhs corner of the control board.remove wires from fuse and chk for continuity.if open replace.if ok remove toe panel at the bottom and remove the screw of j box at rhs bottom corner.chk for loose or burnt wires.do not forgot to unplug the unit from power before doing all this.good luck

Aug 18, 2009 | Dishwashers

1 Answer

No power to dryer, checked fuse and power outlet tey are OK?


First, use a voltmeter to confirm that you have 240 volts to the outer two terminals where the cord connects onto the dryer, and 120 volts from each of the outer terminals to the center terminal. If that checks out OK, look for a broken belt. (a broken belt opens a switch to prevent the motor from running) If that is OK, look for a safety thermostat, about the size of a dime with two wires on it, usually near the top of the heating element. If no continuity there, replace it and try to improve the vent to prevent future problems with it. Newer dryers have auto reset safety thermos, but older ones didn't and they acted like a fuse and needed to be replaced if they tripped. Next time you post a problem, please list the brand and model number. Thanks.

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1 Answer

Whirlpool Dryer not heating


If it was taking longer to heat it probably has a restricted vent. Check for lint build-up. May also have blower cage full of lint.
UNPLUG UNIT FIRST!!
To access blower cage, remove rear panel. Remove four screws holding duct on left side in place at bottom. Remove two screws at filter area on top. Pull duct out at bottom and reach inside and remove lint.
Also ohm out all thermos. Check thermos on side of heater. Check white one to right of duct you cleaned. Check between larger two wires on four wire thermo. All should show zero resistance.
Check between two outside blades of plug. Should have about 220 volts. Pull plug out slightly and carefully check for power between outside blades. Then check for 110 volts from center to either outside blade. It only requires one 11o volt circuit to run, but both to heat.

Nov 08, 2007 | Whirlpool Estate TAWS750PQ 27-Inch Washer

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