Even when I turn the temperature control dial to the hottest setting on the hot water tank, the water still isn't very hot. Is there some sort of a safety valve or a way to get the water out of the taps hotter? Or is this simply a problem with the tank itself? I'm not 100% sure of the brand of the tank. I will double check and edit the post accordingly.
What is hot? Above 122F causes scald within 30 seconds. Get a temperature reading at tap. Use a candy thermometer if need be. If you want 140F water then your gas valve needs replacing. In most code areas it is now illegal to deliver tap water over 125F to a consumer faucet. You may love 140F but you jeopardize kids and Seniors.
a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Repairman (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
First, I don't even want to know why someone would put a tankless outside as you have found out...really bad idea. In order to help you, more information is needed. Is this a gas or electric unit? Or a gas unit with electric controls? Is it mechanically or electronically controlled ( a make and model would help). Are the water lines to or from the tank exposed? When you say no hot water coming from the tap does that mean when you turn on the hot water faucet you just get cold water or no water?
There is an adjustment knob to control how hot the water can become. There might be a problem at the tap (however, if this is the case, you would still get hot water everywhere in the house). If the entire house isn't getting hot water, and the knob is set at the hottest water, you probably need to get the hot water tank replaced.
These Tankless water heaters attempt to heat water as it quickly travels through a short series of heated copper pipes. A high volume of water at an accelerated speed has little time to heat up as it passes through its heating source. You can turn up the temperature (which you undoubtably tried) and turn the water volume all the way down. These settings will produce the hottest temperature capable of the unit - given the entry temperature of your water source. Most underground water enters at app 52 degrees - and becomes even colder due to ambient temperatures. Difficult to raise this temperature 60-70 degrees in a few seconds of heating. I've routed a series of copper pipes adjesent to the home heating system in an attempt to pre-heat incomming water. It's only a few degrees warmer, but results a 20- 30 degree hotter delivery. I have installed some top end units that simply delivers Hot water without compermise.
The problem with all that type of water heater is that once the hot tap is turned on sufficient flow must be maintained through the water heater to keep the main gas burner alight. If the heat adjuster is turned up to high, then the person using the hot water will turn it down to a low rate which means the main burner will turn off and result in cold water. Try setting the heat control to the lowest setting that still gives hot enough water. If you have a thermometer adjust control for a temperature of around 50 to 55 degrees Celcius. You may have to fiddle with fine adjustments to get the temperature and flow rates to maintain a constant output of hot water. You may still have intermittent problems. If the heater only supplies baths or showers you could set the temperatuer even lower (45 to 50) to ensure that the hot tap is used more than the cold which will maintain flow and therefore heat.
How big is your bathtub? Is your water heater set on the hottest setting? What is the temperature of the hot water at the tap?
Keep in mind that hot water can cause severe burns. Children and those with diminished mental capacity can be seriously harmed by hot water.
The "40 Gallon" rating on the water heater is usually the amount of hot water the unit can produce in one hour. So the tank, and the amount of immediately available hot water, might be smaller than 40 gallons.
My bathtub is 2 feet wide by 1 foot deep and 4 feet long. This is 8
cubic feet or almost 60 gallons. So a 40 gallons of water at 120 degrees, mixed
with 20 gallons of cold water (60 degrees), fills the tub with 100 degree
water. My January cold water is 42 degrees, so it will take 40 gallons at 129 degrees to fill the tub. If the tub is cold to start it will take even hotter water.
So the water heater might be just fine.
Possible solutions: 1. turn the temperature up on your water heater- or the temperature control could be malfunctioning and not getting the water hot enough. 2. insulate your hot water pipes so that the water loses less heat on the way to the tub. 3. bigger water heater. 4. smaller bathtub, or less full bathtub.
Try shutting off the gas, shut off the water, and drain the tank to remove any sediment that may interfere with heat transfer from the burner. If that doesn't do it, check the dip tube to make sure it is still intact. The dip tube directs incoming cold water to the bottom of the tank and the hot water is tapped from the top of the tank. If neither of those turn out to be the problem, check the thermo-couple. Since a gas water heater typically survives about 6-9 years, you may be better off just replacing it.