answersLogoWhite

0


Best Answer

A loose or disconnected neutral wire at breaker box or at the appliance. Depending on what is on when and if two or more motors are running at the same time. This can as well have the opposite effect too, lights too bright.

Although loose connection can cause a problem and you should have all the connections checked, it could also be caused by several other reasons. You distance from and the load on the transformer, the size of you service conductors or lateral, the age and maintenance of your appliances. I have found out that light dimming happens in almost every house but some people are more sensitive to it than others.

Usually dimming of lights when an appliance kicks it is caused by a voltage drop of the supply caused by a heavy demand for current when the appliance initially starts. This is usually associated with an appliance that has a motor such as a refrigerator, furnace, washing machine, vacuum cleaner etc. Motors demand about 6 times their steady running current when they first start up and this can be a significant surge of current for maybe a half second or so till the motor has started and is up to speed. This basically momentarily 'overloads' the supply and lowers the voltage available to other devices, thereby causing them to momentarily slow down (if a motor) or dim (if it is a lamp).

If you switch to the new power saving compact spiral bulbs, their internal electronic ballast compensates somewhat for line voltage, so they won't react as noticeably to heavy loads starting up elsewhere in your house. The same is true for fluorescent tube fixtures with electronic ballasts.

One more point:If the lights are on a dimmer, they are very sensitive to change in voltage and will change their brightness disproportionately to the slight changes in voltage caused by motors or other heavier loads switching off and on.
User Avatar

Wiki User

โˆ™ 2015-07-17 17:27:36
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
User Avatar

Add your answer:

Earn +20 pts
Q: What causes lights to dim when the furnace and refrigerator motors come on?
Write your answer...
Submit
Related questions

Why do the lights in my home pulsate?

By pulsate do you mean flicker. A momentary dimming of your lights can be caused by motor loads on your lighting circuits. If your lights dim, this can be caused by a refrigerator, sump pump, garage door opener or other motors sharing the circuit with your lighting.


What runs but cannot walk?

Motors, watches, refrigerator


What event causes the residents of Maple Street to be concerned?

A loud whoosh and all lights and motors go out on the street. This causes suspicion when first one, then another seem to be unaffected.


How much is a 1930 General Motors refrigerator worth?

500


What are the advantages to placing lights and motors in parallel?

Cumlitive output


What could cause the headlights to go on but not up on a 1985 Celica GTS if the motors are working?

If the motors are working, then there has to be a problem between the motors and the lights. If they are only "working" though if you bench test them, and they don't actually do anything when you turn on the lights, then there must be an electrical problem such as a break in a wire or a bad ground to the motors.


What electronics uses magnets?

televisions motors , refrigerator , fans , coolers , A.Cs and much more.


What causes the lunar halo on the moon?

General Motors.


Where can one find a furnace blower motor?

Furnace blower motors are easily found at HVAC installers and repair centers. However, without proper knowledge, a customer should not try to fix this, it can be dangerous.


How do we use magnets in everyday life?

refrigerator magnets, magnetic seals on refrigerator doors, electric motors, credit cards, magnetic latches on kitchen cabinet doors, etc.


What car company first used signal lights in mirrors?

General Motors


Will replacing the heat exchanger prolong the life of your furnace?

The heat exchanger in a furnace is the primary component in a furnace. That said, their are circuit boards, motors and other components that can also fail regardless of the age of the heat exchanger. In my opinion, if you can afford to replace the furnace, you would be much better off. The cost of the heat exchanger with labor is probably not too much less than replacing the entire furnace.


What causes ceiling fan motors to hum?

home appliances


How much is a 1951 General Motors frigidaire refrigerator?

Depends on if it is in good working order and it's condition. Saying that it is worth what someone will pay. Hard to put a price on a refrigerator this old.


Why was electricity important in the 1700?

For the average guy, it wasn't. There were no Electric lights or motors back then.


Instructions on how to repair headlight motors on a 1988 Pontiac trans am?

If the motors run but lights do not come up you need to remove motors and the pull apart and put in small sections of hose these is detailed info on thirdgeneraton.com


What causes an electric motors magnetic field to collapse?

the answer is rotational force


Where is wildingmotors?

wilding motors is on Totnes road ,if your heading for tweenaway traffic lights it is on the right and then you will see a garage that sells fuel,food suplies and cars.Thats wilding motors.


What was the first mass-produced home refrigerator?

The Kelvinator became the first mass-produced home refrigerator. In 1919 General Motors bought a small refrigerator company called Frigidaire, which also made compression refrigerators. By 1920 about 75,000 homes had refrigerators


Why will not my Head lights will not pop up on your 1987 trans am?

Electric headlight motors need replaced.


Why does the red reset button in the garage pop out when you plug in a refrigerator?

A garage will have a GFCI outlet. If this is what you are referring to then the refrigerator is either overloading the circuit or there is a ground fault. Sometimes equipment with motors, like a refrigerator, will cause a GFCI to trip. There may be a real problem in refrigerator causing the ground fault, or it may be an older GFCI that needs to be replaced.


How old is THIS general motors frigidaire refrigerator?

GM owned Frigidaire from 1919 to 1979. So it is at least 33 years old.


What causes a rocket to lift off a launch pad?

The thrust generated by the motors.


What causes a 1998 corvette headlight motors not to retract after being turned off?

Mine did the same thing and I worked the stalk on and off a bunch of times and the problem went away, I have been told this happens because I almost never drive at night and never turn lights on, mine also would not turn lights on when this was happenning


Can 110volt fan motor be used in a 220 volt electric furnace?

Almost all furnace blower motors run on 120 volts. The 240 volt supply to the furnace is typically just a three wire cable two "hots" and a neutral. Furnaces are generally wired to tap one of the two "hot" wires to the neutral wire to run the blower motor.