[Armond Beaty]

I use to heat a cup of coffee in 35 seconds, it now takes about 45 seconds.
Similar results with other items. It appears to be diminishing in heat output.
The oven is a 900 watt power.
I appreciate any help.
Thank you, Armond

[PS Staff - Sheila]

It sound like the magnetron or the transformer is getting weak.

Here is a link to your microwave model TMS134T1G2.