If you have a disposable 1” filter, it should be changed every 30-45 days.
If the bushes are within 12” of the unit, it is likely keeping the unit from running at the highest efficiency it can.
We suggest in the spring and the fall, before each seasons’ use. Call us to schedule a System Check.
Yes, check your furnace filter first. If that is clean then you are most likely low on refrigerant, and we recommend you give us a call.
Most likely your problem is a leaking toilet. You can try changing the flapper ball, or call us to schedule a service call.
Soak a rag in white vinegar and wrap it around the fixture for a few hours. This should dissolve the calcium.
You actually have a common problem - the particles are coming from the “dip tube” inside of the water heater. This is a tube that takes the cold water to the bottom of the heater and forces the hot water upwards as you use it. We can solve this by replacing these with a piece of copper and flush the water heater out.