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Voltage light comes on and shuts off heater

When I turn it on it fires up o.k. but after about 10 seconds the voltage light blinks on and kills it. I checked the ground wires and they seem fine.

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I happen to be in the heater buisness too and the problem you are having is more than likely due to a faulty thermostadt. Many factories buy there thermostadts in the US and have them shipped to China. Last year many of those shipped were defective and are pre-set to shut off lower than where they should due to a faulty internal setting from the thermostadt manufacture.

Posted on Jun 02, 2009


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If the unit has a flame sensor, a rod at the burner opening, sometimes if you remove it and clean it with steel wool, this might solve the problem.

Posted on Jan 19, 2008


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I have a 2006 Shadow Aero everything works fine exept the headlight bulb is fine and fuses are good,comes on for a second or two checked whatever I could now where to go?

Hi, Mike if your headlight is not working, only one beam works, keeps burning out, blinking, or is dim the first thing you need to check is the headlight bulb for damaged filaments then check your light circuit fuse, then check your head light bulb socket ground wire for a clean tight connection, that being said the usual suspects are:
1. Faulty ground or power supply wire to headlight bulb socket.
2. Worn down solder contacts or loose fit of the bulb base in the socket due to vibration.
3. Worn, chaffed, or broken wires in the light circuit.
4. Corroded, broken, or loose pins/sockets in wire connectors.
5. Faulty hi/lo beam switch.
6. Faulty ignition switch.
7. Fuse is good but no continuity on both sides.
8. Faulty wiring between battery positive and headlight bulb socket.
9. Weak charging alternator/generator.
10. Faulty voltage regulator/rectifier ground or overcharging.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Headlight problem

Btw, I’m available to help over the phone in case u need at

Sep 14, 2016 | Motorcycles

1 Answer

21 hp kohler courage sv610-3213 has no spark. Replaced coil and still no spark.

First install a known good spark plug and check.

If still not firing disconnect the coil kill wire and test.

If still not firing and the flywheel magnets are good and strong then you have another bad coil. In this case put a voltmeter between the kill wire and ground. Now slowly cycle the ignition switch if any voltage spikes shows up then you a bad ignition that it has fried another coil. If this is the case then you must replace the ignition switch before you install another or the same thing will happen again

These ignition coils are not designed to have anything other ground applied the kill terminal. Applying the battery voltage at anytime will kill it ie intentional application of 12V.

Nov 20, 2014 | Garden

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94 Opel kadett 1.6 single injector. Petrol does not seem to get thru for car to start.petrol pump is ok.where could the problem be.

Check the injector circuit. Here's how injectors usually work: when key is on, they have live power available to them. Key on, the circuit is turned on, so power passes through a fuse to the injector on the power wire. (Check the fuse- it's under the hood, most likely.)
To make the injector "pulse" or spray fuel out, the engine computer will internally ground the circuit for a split second. The injector has a power wire to it from that fuse. Then the ground wire at the injector goes into the computer.

If you have a test light, you can test the circuit. First, clip a test light ground lead to negative battery post. With key on, and the injector connector unplugged, check for battery voltage on the power wire. One of the wires should have voltage and will light up the test light. Now, move your test light lead to the battery POSITIVE post. Have a helper be cranking the engine over while you probe the ground wire-the one that did not light up the test light. If the injector circuit ground is good, the test light will now be blinking. (You are putting voltage into the ground wire to the computer, to check if it is properly grounding the circuit. Every time the light blinks, the computer has grounded the circuit.)
If the circuit passes both tests (key on, steady test light on power wire; engine cranking, blinking light on ground wire), then the injector circuit is good. The injector should be pulsing when it is connected and the engine is cranking. If no gas is coming out of the injector, could be that fuel is blocked somewhere (filter?) from reaching the injector, or it could be a shorted injector. Someone with a volt-ohm meter should check the resistance across the injector terminals and compare with manufacturers' specifications. This will determine if the injector is bad.

Sep 13, 2014 | Cars & Trucks

1 Answer

Blinking Check Engine Light / Rough Idle

Double check the spark plug wire firing order. The cylinder have to have voltage in a certain order. If you do not have a motor manual you can google for this information. just write for example: 2002 ford taurus 6 cylinder spark plug firing order. The firing order goes in sequence usually in a clockwise direction. For example: 1, 5, 3 ,6 2, 4 in a clockwise order. spark plug #1 wire goes to the coil then spark plug #5 wire goes on the coil in a clockwise rotation, next to where spark plug # 1 was connected. This would mean that spark plug number 1 will fire (or get voltage), then spark plug nuimber 5 will fire (get voltage), then spark plug number 3 and so on. The sequence will continue to happen over and over again as long as the car is on. Here's another tip! When it nice and dark outside, turn your car on with the hood open and look at your spark plug wires for any voltage jumping from the wires to the motor metal. Keep in mind you may have to tent yourself with a cardboard to see the voltage arcing to metal. It has too be super dark for you too see this fault. Any arcing will cause your engine to misfire and your engine light to come on. Hope this gives you a starting point to finding the problem. Good Luck.

Mar 07, 2014 | 1996 Pontiac Sunfire

1 Answer

Starts cold but not when warm

Are you certain that the pump is on when the no start occurs? Do you hear it turn on with key on, not start, when the engine won't fire? It should turn on for 2 seconds to pressurize the line to the injectors. If you could, check fuel pressure when the no start occurs.

If it is the injectors, buy a cheap "noid light" to check the injector circuit. Buy the one that fits your injector harness connectors. You pull off a connector to one injector and put the noid light in the connector. When cranking the engine over the noid light should be blinking-that is the pulse that fires the injectors. The injectors have battery voltage to them any time the key is on. When the ecm momentarily grounds the injector circuit (internally in the ecm), the injector is pulsed. If the noid light does not blink or even light up when cranking, the injector circuit has a problem in the power side or the ground side.

Feb 09, 2014 | 1991 Chevrolet C/K 2500

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My kitchen light stopped working. I used a tester to check for power. When i touch the black and ground wire it lights up. when i touch the black and white it doesnt lite up. when i touched the white and...

You have an open neutral. The reason you get light from hot to gnd is there is potential or voltage between them. With the bulb in, and the switch on, the white will read as the black. Yet nothing between them. Take out the bulb and turn on the switch. Now the white will not light up at all. Find the broken or burned white wire in a box, another light, a switch, or a burned wire. Please have a qualified repairman as you may burn down your house or possibly kill somebody. An open neutral can cause immediate fire. By removing wire nuts on other neutral junctions, you can instantly cause a fire and burn your house down. I am not kidding. Call in the troops to fix this one.

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1 Answer

After starting my 2003 saturn L300 my power windows work for about 10 seconds before dying. This happened about 6 months ago but then seemed to fix themseleves because they worked fine after that. Its now...

If voltage isn't reaching the motor, check the wiring in the circurit for continuity between the switches and motors. You'll need to get a wire diagram for this vechicle. Some power windows circuits are equppped with relays. If equipped, check that the relays are grounded properly and receiving votage from the swithches. also check that each relay sends voltage to the motor when the switch is turned on. If it doesn't replace the relay.

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