Thermostat or maybe a dimmer switch?
On 8/23/2010 10:48 AM, Sam Morgan wrote:
> A little more background
> We have isolated it to a 110 circuit
> but the night the electrician came out to chase it
> it failed to show up.
>
> However before it started, he was a tad impatient (it was 7:15+ at night)
> so he had gone around throwing breakers, of course none mattered, as the noise
> wasn't present so we couldn't find and isolate the problem.
>
> The only things he did that night that were out of the ordinary were:
> He ran and reset the timer on the yard sprinkler system. Although the times
> were
> in no way related to the noise start/stop times. AND, he rang the door bell
> which hadn't been used in a year as the house had been empty (but with power
> on). I had always been suspicious of the door bell transformer.....
>
> After that night, the noise was back again, but weaker and more intermittent,
> Normally when it comes on in the evenings, it's on 10 sec and off 30 sec.
> increasing to where 2 hrs later it was on 55 sec and off 5 sec. Then there is
> about 10 min where it is on doe 90s of for 3 sec then it stops for the night,
> always around 9:30pm
>
> Then after a couple of days the noise quit completely for about 4-5 days. No
> one
> had been in the house to do anything different those days.
>
> Then last night after a glorious few days with out the noise it is back.
>
> To also add to the mix, this noise only comes out in summer when the temps get
> over 85 in the day. It's quiet in winter, this has been the case for the last
> 2
> years. One year with folks living there and one year with no one living there
> but the power on.
>
> On 8/23/2010 11:26 AM, Ken Winterling wrote:
>> Sam,
>>
>> I haven't run across a garage door opener RFI problem. Typically, they just
>> run
>> the motor to open/close the door then keep the light on for some time (4
>> minutes
>> or so). The rest of the time the receiver is just quietly listening for a
>> transmitter signal. While it is running I could see it generating some noise
>> but that should only be a matter of seconds while the door travel up/down.
>> Verify with the owner that the ONLY thing he did was open/close the garage
>> door. Did he turn on/off any lights or do anything else while there?
>>
>> Assuming you have narrowed the RFI to this specific house, have any/all of
>> the
>> following been checked?
>> * A/C system - inside and outside components including condensate pump, if
>> equipped
>> * Heating system (not likely at this time of year)
>> * Electric water heater
>> * Refrigerator/freezer
>> * Attic/gable ventilator fan(s)
>> * Sump pump
>> * Water softener/conditioner
>> * Well pump and/or controller
>> * Alarm systems
>> * Security lights (electronic controls including photo-electric)
>> * Devices on a timer
>> * Defective GFCI outlet
>> * Battery chargers/"wall warts" for all sorts of devices. Switch mode power
>> supplies are the worst offender.
>> * ???
>>
>> I'm sure there are more but these items jump to mind. Good luck with your
>> hunting and keep the list posted.
>>
>> Ken, WA2LBI
>>
>>
>> On Mon, Aug 23, 2010 at 12:00, Sam Morgan<k5oai.sam@gmail.com
>> <mailto:k5oai.sam@gmail.com>> wrote:
>>
>> It's possible an intermittent local noise problem may turn out to be
>> related to
>> their garage door(s) opener(s). What part of the opener might be the
>> problem?
>> How/what might could be done to fix it?
>>
>> The house is currently empty, but renters will be moving in by next
>> week.
>> The owner is working with me, but we have previously been unable to
>> find the
>> problem.
>>
>> The noise had been silent the last week, but started back up last
>> night. I
>> called him and ask if he had been at the house and if so what had he
>> done
>> different. He said he had just been there and opened the garage doors
>> to remove
>> his work trailer and then closed it back up.
>>
>> To add another weird aspect of the problem. When it's noisy, it's only
>> 2 times a
>> day. (with no one even at the house) First for about an hour some time
>> between
>> 12 noon and 2pm. Then again for 2-3 hours starting about 7pm lasting til
>> about 9:30.
>>
>> Again I think we have isolated it to the garage door openers.
>>
>> Any help gratefully appreciated.
>> --
>> GB& 73
>> K5OAI
>> Sam Morgan
>>
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