Wiring & Tv interferance problems

Hello again guys. my next situation is from the begining when we moved into the new used manufactured home (a 1995
model) i have heard a slight pop in either the tv or stereo depending on which is being used.

this morning lesia had the heater running when i awoke and the tv on. there was a nasty looking interferance line on the screen and quite a hum too.

when turing off heater blower the line goes away of couse.

the service entrance is new and was done by licensed electrician which really does not make me feel too much better in this area. im sure there are some fine electricians here somewhere. i just have not met them yet.

i did have one at previous home wire pump for me and run inside romex in the ditch which i had dug. maybe the van already had an er # on it when he bought it

but back to this problem. i did not install medicine cab yet so its not something
i blundered at yet. the pop when switching lights is not too bad but the
heater/ac interferance makes it to where you really no longer want to watch the tv. its bad.

the heater/ac is a split sys with heat strips inside and air handler outside
made by intertherm.

i dont know what else to tell but will
investigate anything you guys need for me to do. as always thanks in advance
john

 

More than likely, the heater is either on the same circuit as the TV or sharing the neutral. Try plugging the TV into a different circuit and see what happens.

Good Luck.

 

Get a battery AM radio. Tune between stations. Listen for static to change as the heat goes on and off. With heat on, move the radio around and try and find exactly what is causing the interference. If the radio is too sensitive, wrap it in a layer (or 2) of aluminum foil. You are looking for whatever part of the system is producing an electric arc and causing the noise. Universal motors (brush motors) are one source, bad electrical connections, and even a poorly designed thyristor circuit (solid state relay, dimmer) can all cause arcs and interferance.