Water runs through it imemediately before it heats up.

Turn off water but leave heat on - Possible? - Handyman WIRE ...

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Jan 14, 2003 - 10 posts
My hot water baseboard heating system is a closed system. ... Could I shut off the main water and leave the boiler and heat going for ... If one is not installed, install one and rely on that to save the boiler from the damage of running out of ... I do not wantto have city water push my antifreeze out of the system ...

What's the best temperature to set my hot water baseboard ...

greenhomeguide.com/.../whats-the-best-temperature-to-set-my-hot-water...

Nov 21, 2010 - With hot water baseboard heating, is it better to keep the heat at 60+ degrees ... a hot water heating system where water is heated in a hot water boiler and then ... by setting the thermostat to lower the heat when you don't need it on. ... Not only do I turn my heat down when I leave for work in the am but also ...

If the units are in a RV then yes, they both may run on gas and DC (battery power). The furnace requires gas to provide heat and DC power to run the fan. A water heater may be gas or electric, but if gas, it requires gas to heat and DC power to ignite. If the water heater is electric it requires AC power to heat.

turning the heat on lowers the temperature of the water running through the engine which in turn lowers the pressure in the radiator

Most dishwashers don't heat the water. They run on whatever temperature water you have it set for. They have heating coils on the bottom but that's for drying, not heating up the wash water.

On a water-cooled system, by design the heat from the machine is being transferred to running water that carries the heat away. Some installations pump this "waste" water to a heat-exchanger or cooling tower (typically on a rooftop), where the heat is transferred again, this time to the air. The water with the heat removed is then recycled back to the machine, where the process is repeated continuously. There is thus no "wasted" water.
If your cooling water is just running down the drain, that's a terrible waste of water and money. Try to find a way of recycling the water by removing the heat and re-using it. Think of ways to use the "free" heat in the water.
Alternatively, buy a proper rooftop heat exchanger and pump the water through it, or, get an old car radiator or air conditioning condenser and a decent blower, and make your own.
Remember that your machine needs constant cool water in order to avoid overheating the system.

You are supposed to connect the dishwasher to the HOT water side. Although most dishwashers have a heating element to heat the water, they are normally installed this way to reduce the amount of time the heating element is on. This not only extends the life of the heating element, but also reduces the amount of electricity required to heat the water.

Another helpful hint: Before you run the dishwasher, run the hot water tap until the water runs hot. This will fill the dishwasher with water that is already hot instead of the cold water that normally sits in the line after the hot water has been shut off for a while. If you have questions, please let me know. I hope this helps you.

Connect the dishwasher to the HOT water side. Although most dishwashers have a heating element to heat the water, they are normally installed this way to reduce the amount of time the heating element is on. This not only extends the life of the heating element, but also reduces the amount of electricity required to heat the water. Another helpful hint: Before you run the dishwasher, run the hot water tap until the water runs hot. This will fill the dishwasher with water that is already hot instead of the cold water that normally sits in the line after the hot water has not been run for a while. If you have questions, please let me know. I hope this helps you.

he cycles times are too long If your dishwasher's cycle times are too long, check these:

Water pre-heating
Cycle not completing
Water pre-heating Your dishwasher may pre-heat the water. If so, and if the water entering the dishwasher is cool, the heater may take up to half an hour to heat the water. 

To avoid the wait, increase the incoming water temperature before turning on the dishwasher. Do that by running the kitchen sink faucet until the water runs hot. Or increase the temperature of the hot water to the entire house at the hot water heater.

Warning! To lessen the risk of scalding, don't set the hot water heater temperature higher than 120 degrees Fahrenheit. 

Cycle not completing See "The cycle doesn't complete" section. 

The cycle doesn't complete If the cycle doesn't complete, check these:

Water-heating cycle
Timer
Water-heating cycle Many dishwashers heat the wash and/or rinse water to a higher temperature, as the cycle calls for it. In these cycles, the dishwasher pauses after it has filled with water, waiting for the water to reach the pre-set temperature. What happens next, depends, as follows:

• On some units, the pause is timed and the unit continues after the allotted time.



• On others, the cycle can't continue until the water reaches the higher temperature. If you have this type of dishwasher and the water isn't being heated (say, because of a problem with the heating element or thermostat), after the unit stops at the heating cycle, it never continues. When you repair the heating-system problem, the "cycle problem" is fixed too.

Timer Timers don't often fail. But if every other part of the dishwasher seems to be working properly and the timer knob seems to be stuck in one place--doing one function continuously--the timer may be at fault. Dishwasher timers can't be repaired. If yours is defective, replace it. 

If your dishwasher's cycle times are too long, check these:

Water pre-heating
Cycle not completing
Water pre-heating Yourdishwasher may pre-heat the water. If so, and if the water entering thedishwasher is cool, the heater may take up to half an hour to heat thewater.

To avoid the wait, increase the incoming watertemperature before turning on the dishwasher. Do that by running thekitchen sink faucet until the water runs hot. Or increase thetemperature of the hot water to the entire house at the hot waterheater.

Warning! To lessen the risk of scalding, don't set the hot water heater temperature higher than 120 degrees Fahrenheit.

Cycle not completing

If your dishwasher's cycle times are too long, check these: Water pre-heating Your dishwasher may pre-heat the water. If so, and if the water entering the dishwasher is cool, the heater may take up to half an hour to heat the water. 

To avoid the wait, increase the incoming water temperature before turning on the dishwasher. Do that by running the kitchen sink faucet until the water runs hot. Or increase the temperature of the hot water to the entire house at the hot water heater.

Warning! To lessen the risk of scalding, don't set the hot water heater temperature higher than 120 degrees Fahrenheit. 

Cycle not completing f the cycle doesn't complete, check these:
Water-heating cycle Many dishwashers heat the wash and/or rinse water to a higher temperature, as the cycle calls for it. In these cycles, the dishwasher pauses after it has filled with water, waiting for the water to reach the pre-set temperature. What happens next, depends, as follows:

• On some units, the pause is timed and the unit continues after the allotted time.



• On others, the cycle can't continue until the water reaches the higher temperature. If you have this type of dishwasher and the water isn't being heated (say, because of a problem with the heating element or thermostat), after the unit stops at the heating cycle, it never continues. When you repair the heating-system problem, the "cycle problem" is fixed too.

Timer Timers don't often fail. But if every other part of the dishwasher seems to be working properly and the timer knob seems to be stuck in one place--doing one function continuously--the timer may be at fault. Dishwasher timers can't be repaired. If yours is defective, replace it.