If the lower element isn’t working, the water temperature will fluctuate. 1. Can anyone hazard a guess what is causing this and is this something that I can fix myself rather than spend the kids Christmas presents on getting him in again? A bath full will be just warm. Any help would be great. Gas, Solar Electric and heat pump hot water systems from all the major manufacturers. In about a 20 minute period, for some reason my shower will get completely cold for a few seconds before getting warm again. I've been assuming that there is a small reserve of hot water being used up, and that after that, the heater needs a few minutes to kick in and produce some hot water for me. The thing is that since he left the hot water runs alternately hot and cold. No matter how long we run it at this time it won't get hot again. TheDoctor5 Posts: 1382 Joined: Tue Jan 20, 2009 9:17 am. The dip tube is in the water heater tank and shoots cold water to the bottom of the tank where the heating of the water occurs. Usually turn the hot water on and turn the cold on alittle too and wait til the water temp is how I like it. A bit irritating when you're in the shower, as you might imagine. when turning on the hot water the boiler strikes up but only for few minutes then turns off again then strikes up again it keeps doing this meaning the bath water is only luke warm wayne October 2010: There is more help available. The house was built in the late 50s, early 60s. My shower starts out hot but then after 4-5 minutes goes cold, then 4-5 minutes later gets hot again. I can fill up half a washing up bowl with the hot water then it goes cold. Best Answer. The cold water supply dip tube, or dip tube for short, is meant to send cold water to the bottom of the tank to heat it up, allowing hot water to rise to the surface, and be sent directly to your appliances and faucets. Top. It’s totally fine to drink it, and as long as it wasn’t kept warm for too long the flavor likely wasn’t changed. In the case of successive showers using a tankless water heater, you may notice that the second person taking bath in the same shower just after the first person has taken the shower, will be exposed to warm water initially and then he will be blasted with cold water from the heater till it gets heated up again … Most water heaters have two heating elements—one … Every post goes through a monitoring process and using the search box may speed up your answer. I have a combi boiler but the heating is working fine - all radiators are unaffected and my electric shower works fine to. On home water heaters, there is an upper and lower thermostat, and the upper one diverts power to the lower one when the water at the top of the tank reaches the correct temperature. Are there any reasons that the water might be losing it's temperature? when i turn the hot water kitchen tap on, the water comes out luke warm although i feel the hot … The boiler … We live on a farm and use well water. One solution is to turn DOWN the required temperature of the water. He's checked the pump and it's running ok. Hello, I have an 85 gallon Marathon high-efficiency electric water heater--domestic water only. We now have hotter water in the morning but in the evenings we get hot water for about 1 min then it goes cold so I turn it off and wait a few minutes then we get hot water again for about 20 secs before it goes cold again, etc etc. MisterFish, 10 Dec 2014 #1. All the other taps in the house are fine, including another mixer shower. It doesn't happen every time though. i have a mixer shower connected to a combi boiler downstairs. We also tried running the hot tap slowly, and it stops oscillating, but just runs cold instead. Discussion in 'Plumbers' Talk' started by SeanyK, Aug 4, ... it was hot, and then once again went cold not long after - this is with the cold feed isolated. Sponsored Links; ALCPlumbing. If your hot water temperature changes between hot and cold unpredictably, you may need to test the lower hot water heater element. Boiler Homecare. I am having problems with my mira sport shower , it starts hot then goes cold and keeps on doing this, I have checked the filter which was a little dirty but made no difference. Home » Advice & guides » ... and then runs hot again. Your shower gets hotter for a moment while the toilet fills (and the cold water is sent to the toilet), but then that cold water becomes available again, mixing with the hot water going to shower, resulting in a drop in temperature. Now it is back. You think you can tough it out, but then the water becomes so unbearably hot that you’re forced to jump out of the shower. Since then, I more carefully checked the kitchen tap and that is also oscillating between hot and cold, but to a lesser degree (i.e. Baxi combi 105 hot water goes cold then hot again? Lately we are getting very hot water for a few minutes but then the water goes cold. When one branch needs water (such as someone flushing the toilet), that branch suddenly siphons off some cold water. “My tankless water heater runs hot, then cold, then hot again.” The problem behind the complaint? The water will be nice and hot, suddenly drop to ice cold and then eventually go back to hot. He said its definitely electrical and the next thing is to replace the PCB. Then its fine for another 3-5mins then goes cold again … What should I do next? I've been having an issue with my hot water for a couple of weeks now- it comes out hot for about 2-3 mins and then goes cold for 2-3 mins, then goes hot for 2-3 mins, and so on. 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