Only if if has a leak.
A tankless water heater is much more efficient as it "flash" heats the water.
Yes, you will need a hot water tank for your water heater. There are, however, some tankless water heaters on the market. They cost a bit more, but there is a federal tax credit on them.
No and yes. No, you won't get more water pressure. To do that you'll need to find out why the water pressure is low. Perhaps flow restriction, perhaps a poorly adjusted water pressure regulator, perhaps low pressure from the well/city water. But an additional water heater will certainly give you more hot water. It would be like putting in a LARGER water heater. In most cities the water pressure required is about 20 PSI. Small city's do not add pressure pumps to their system but use a gravity supply. That is why most places there is a pressure problem either build their water tanks taller or erect them on a hill.
Solar water heating is generally more cost effective than an electrical water heater. Though solar water heaters usually have a higher initial investment if commercially purchased.
It sounds more like a water heater issue, more than likely you are heating your water with a boiler and there are either coil cleaning or, control issues.
It is most likely the water heater. More specifically, the anode in the water heater likely needs to be replaced.
most likely cause will be a faulty fan speed resistor.shouldnt cost more than $50 to replace
It is possible to fix a water heater leaking from the top by replacing the faulty part causing the leak, such as the temperature and pressure relief valve or the inlet or outlet pipes. However, if the leak is due to a more serious issue like a corroded tank, it may be necessary to replace the water heater entirely.
It is possible to fix a hot water heater leaking from the top by replacing the faulty part or seal. However, if the leak is extensive or the unit is old, it may be more cost-effective to replace the entire unit.
Normally NO
The clutch fan will not cause this issue. The more likely causes are a stuck open thermostat or coolant not flowing properly through the heater core.
The issue could be due to a blockage or sediment buildup in the hot water line, causing restricted flow. Another possibility is a faulty or partially closed hot water valve. Consider checking the hot water heater or consulting a plumber to diagnose and resolve the problem.
An automobile's heater that blows only cold air could either be a faulty thermostat or, more likely, a faulty heater core. A trip to a mechanic or shop that specializes in radiator and cooling system repair should be able to diagnose and repair any problems.
Hot water heater problems are more common in the winter, due to the constant usage; this is especially true, if your water heater is run on gas.
A small tank water heater is more energy-efficient, takes up less space, and heats water quickly compared to a traditional water heater.
A tankless water heater is much more efficient as it "flash" heats the water.
Determine what is causing the problem, faulty belt tensioner, alternator water pump, a/c compressor, one or more of these components could cause the problem.