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> 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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