We don't , what we do is call the manufacturer or just replace the heater entirely so as not kill anyone over a defective installation
It is probably right next to the water heater. There should be a shutoff at the floor, if not then at the meter is the most likely shutoff.
No
Your water shutoff valve is typically located near the main water line where it enters your home. It is often found in the basement, crawl space, utility room, or near the water heater.
It means your water heater does not have the right combustion air for the gas valve to operate correctly or your vent may be plugged
The purpose of a water heater vent cap is to safely exhaust combustion gases from the water heater to the outside. It helps prevent the buildup of harmful gases like carbon monoxide inside the home. By ensuring proper ventilation, the vent cap contributes to the efficient and safe operation of the water heater system.
15 minutes to half an hour.
There should be a shutoff at the wall where the water line enters the house. There may be one before the water heater or there will be one at the water meter.
The water shutoff valve in your house is typically located near the main water line where it enters your home. It is often found in the basement, crawl space, utility room, or near the water heater. It is important to know its location in case of a water emergency.
Inspect bottom of tank by looking through combustion chamber. If water marks or heavy rusting is noticed or if water is noticed setting in combustion chamber bottom, then the water heater needs to be replaced.
Connect the domestic coil thru a tempering valve to the hot water pipes in your house and turn off the valves to your old hot water heater. You should include a shutoff valve so you can revert to the hot water heater when you have your coal boiler shut down.
you could buy a new one ? or call a mechanic ?
A water heater thermal expansion tank helps to relieve pressure that builds up in the water heater system as water heats up and expands. This helps to prevent damage to the water heater and plumbing system, as well as maintain the efficiency and safety of the water heater by reducing stress on the system components.