Electrical, query give or take a few outlet tester.? Why would the "neutral" light keep going bad and on when checking...

Why would the "neutral" light keep going bad and on when checking "all" of the outlets in the house? I have two testers, this happen with both. What do I look for to fix this problem?
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Answers:    by saying the indeterminate light keeps going bad and on, I'm assuming that is the middle light on your tester. Your also maxim it happens on all the outlets contained by the house. The right two lights on that tester should stay on and the left one should be off. I'm assuming the worst that you enjoy a loose wire in your box. If it affects adjectives the wires in the house then it have to come from the main. What does the power act approaching. Do you have power interruptions or outages? If you have no problems, what cause you to check the outlets? I agree with you that you have an issue and want to find out what to do about it. Maybe you'll get a clearer answer than mine.
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i'm not sure what brand of tester you are using, but i would get a digital multimeter and chek your 'hot'
(that would be the smallknife blade slot) to ground(the half-round slot) and to neutral( the wide blade slot), you should enjoy 110-120v to both. you should NOT have 110-120v from neutral(wide blade slot) to ground.If so, you've got a break contained by connection or something is wired wrong. By outlet tester, are you talking around a molded plastic, three prong, three light, polarity tester?