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#1
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Too much hysteresis in water heater thermostat
replying to Peabody, rdankwort wrote:
This is a very common phenomenon in water heaters. In the morning my temp. is just warm; after I do a load of laundry it is piping hot. And in-between for moderate use. Unlike you I don't like to mess with my thermostat setting. It's a crummy honeywell regulator on a Bradford-White tank. The Robertshaw I used to have on my earlier tank at least had visible and large temp. setting marks; the honeywell is a tiny knob with useless setting markers. Anyway, if I want hot water in the morning I try to get up a bit early & run a water faucet somewhere. I know that'sa sinful waste of water but what would you. BTW living in a hot desert climate I have a very different summer problem also: between the hot garage temperatures and the pilot my water runs almost dangerously hot.. The pilot alone keeps the temp. up! I once tried just shutting off the pilot but then the water temp.was way too low. -- for full context, visit https://www.homeownershub.com/mainte...at-659359-.htm |
#2
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Too much hysteresis in water heater thermostat
On 2/5/2020 10:44 PM, rdankwort wrote:
replying to Peabody, rdankwort wrote: This is a very common phenomenon in water heaters.Â* In the morning my temp. is just warm; after I do a load of laundry it is piping hot.Â* And in-between for moderate use. Unlike you I don't like to mess with my thermostat setting.Â* It'sÂ* a crummy honeywell regulator on a Bradford-White tank.Â* The Robertshaw I used to have on my earlier tank at least had visible and large temp. setting marks; the honeywell is a tiny knob with useless setting markers. Anyway, if I want hot water in the morning I try to get up a bit early & run a water faucet somewhere.Â* I know that'saÂ* sinful waste of waterÂ* but what would you. BTW living in a hot desert climate I have a very different summer problem also: between the hot garage temperatures and the pilot my water runs almost dangerously hot.. The pilot alone keeps the temp. up! I once tried just shutting off the pilot but then the water temp.was way too low. After 15 years we finally have an answer. |
#3
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Too much hysteresis in water heater thermostat
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#4
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Too much hysteresis in water heater thermostat
On 2/5/20 10:44 PM, rdankwort wrote:
replying to Peabody, rdankwort wrote: This is a very common phenomenon in water heaters.Â* In the morning my temp. is just warm; after I do a load of laundry it is piping hot.Â* And in-between for moderate use. Unlike you I don't like to mess with my thermostat setting.Â* It'sÂ* a crummy honeywell regulator on a Bradford-White tank.Â* The Robertshaw I used to have on my earlier tank at least had visible and large temp. setting marks; the honeywell is a tiny knob with useless setting markers. Anyway, if I want hot water in the morning I try to get up a bit early & run a water faucet somewhere.Â* I know that'saÂ* sinful waste of waterÂ* but what would you. BTW living in a hot desert climate I have a very different summer problem also: between the hot garage temperatures and the pilot my water runs almost dangerously hot.. The pilot alone keeps the temp. up! I once tried just shutting off the pilot but then the water temp.was way too low. The Honeywell on my natural gas Lochinvar works fine but it's a pilotless ignition model. |
#5
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Too much hysteresis in water heater thermostat
In alt.home.repair, on Thu, 6 Feb 2020 03:44:02 +0000, rdankwort
m wrote: replying to Peabody, rdankwort wrote: This is a very common phenomenon in water heaters. In the morning my temp. is just warm; after I do a load of laundry it is piping hot. And in-between for moderate use. This doesn't make sense. It should be up to its maximum temp when no one has used any hot water. And if you take a deep bath or very long shower, it should run out of hot water until it has time to heat it again. Are you just talking about the water in the pipes between the water heater and the faucet? Of course that cools off over night. Unlike you I don't like to mess with my thermostat setting. It's a crummy honeywell regulator on a Bradford-White tank. The Robertshaw I used to have on my earlier tank at least had visible and large temp. setting marks; the honeywell is a tiny knob with useless setting markers. Anyway, if I want hot water in the morning I try to get up a bit early & run a How early? It takes 3 minutes at most to run the hot water until the water in the pipes has gone through it and hot water comes out You can brush your teeth during that time, don't have to get up early at all. water faucet somewhere. I know that'sa sinful waste of water but what would you. BTW living in a hot desert climate I have a very different summer problem also: between the hot garage temperatures and the pilot my water runs almost dangerously hot.. The pilot alone keeps the temp. up! I once tried just shutting off the pilot but then the water temp.was way too low. |
#6
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Too much hysteresis in water heater thermostat
On Wednesday, February 5, 2020 at 11:14:02 PM UTC-5, Ed Pawlowski wrote:
On 2/5/2020 10:44 PM, rdankwort wrote: replying to Peabody, rdankwort wrote: This is a very common phenomenon in water heaters.Â* In the morning my temp. is just warm; after I do a load of laundry it is piping hot.Â* And in-between for moderate use. Unlike you I don't like to mess with my thermostat setting.Â* It'sÂ* a crummy honeywell regulator on a Bradford-White tank.Â* The Robertshaw I used to have on my earlier tank at least had visible and large temp. setting marks; the honeywell is a tiny knob with useless setting markers. Anyway, if I want hot water in the morning I try to get up a bit early & run a water faucet somewhere.Â* I know that'saÂ* sinful waste of waterÂ* but what would you. BTW living in a hot desert climate I have a very different summer problem also: between the hot garage temperatures and the pilot my water runs almost dangerously hot.. The pilot alone keeps the temp. up! I once tried just shutting off the pilot but then the water temp.was way too low. After 15 years we finally have an answer. If it's a common problem, I've had decades of experience and never had noticeably temp swings like that. Granted it's only been with maybe five of them, but they were mostly just the basic pilot light type, nothing fancy or expensive and they maintained temp so I never noticed a difference. Unfortunately the cost of a new gas valve assembly is probably so much that unless it's new you might as well change the whole thing. And if it was doing this when new, should have documented how much the temp varies and called the manufacturer. They might have sent a new valve assembly. I had a State WH where the thermocouple failed while under warranty. I called them up, they had a new one here in a few days, no charge. Of course a valve assembly costs a lot more, so they may not be so quick to replace, but I'd think if it was really out of range, they would. |
#7
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Too much hysteresis in water heater thermostat
On Thursday, February 6, 2020 at 10:18:51 AM UTC-5, micky wrote:
In alt.home.repair, on Thu, 6 Feb 2020 03:44:02 +0000, rdankwort m wrote: replying to Peabody, rdankwort wrote: This is a very common phenomenon in water heaters. In the morning my temp. is just warm; after I do a load of laundry it is piping hot. And in-between for moderate use. This doesn't make sense. It should be up to its maximum temp when no one has used any hot water. Not after a couple of hours. And if you take a deep bath or very long shower, it should run out of hot water until it has time to heat it again. Sure, but they didn't say they were pulling a very long shower, just a load of laundry. So, it's enough to trigger the WH to fire up and start heating the water again. Are you just talking about the water in the pipes between the water heater and the faucet? Of course that cools off over night. Unlike you I don't like to mess with my thermostat setting. It's a crummy honeywell regulator on a Bradford-White tank. The Robertshaw I used to have on my earlier tank at least had visible and large temp. setting marks; the honeywell is a tiny knob with useless setting markers. Anyway, if I want hot water in the morning I try to get up a bit early & run a How early? It takes 3 minutes at most to run the hot water until the water in the pipes has gone through it and hot water comes out You can brush your teeth during that time, don't have to get up early at all. water faucet somewhere. I know that'sa sinful waste of water but what would you. BTW living in a hot desert climate I have a very different summer problem also: between the hot garage temperatures and the pilot my water runs almost dangerously hot.. The pilot alone keeps the temp. up! I once tried just shutting off the pilot but then the water temp.was way too low. Lost in the wilderness, as usual. |
#8
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Too much hysteresis in water heater thermostat
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#10
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Too much hysteresis in water heater thermostat
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#11
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Too much hysteresis in water heater thermostat
On Thu, 06 Feb 2020 10:18:40 -0500, micky
wrote: In alt.home.repair, on Thu, 6 Feb 2020 03:44:02 +0000, rdankwort om wrote: replying to Peabody, rdankwort wrote: This is a very common phenomenon in water heaters. In the morning my temp. is just warm; after I do a load of laundry it is piping hot. And in-between for moderate use. This doesn't make sense. It should be up to its maximum temp when no one has used any hot water. And if you take a deep bath or very long shower, it should run out of hot water until it has time to heat it again. Are you just talking about the water in the pipes between the water heater and the faucet? Of course that cools off over night. Unlike you I don't like to mess with my thermostat setting. It's a crummy honeywell regulator on a Bradford-White tank. The Robertshaw I used to have on my earlier tank at least had visible and large temp. setting marks; the honeywell is a tiny knob with useless setting markers. Anyway, if I want hot water in the morning I try to get up a bit early & run a How early? It takes 3 minutes at most to run the hot water until the water in the pipes has gone through it and hot water comes out You can brush your teeth during that time, don't have to get up early at all. water faucet somewhere. I know that'sa sinful waste of water but what would you. BTW living in a hot desert climate I have a very different summer problem also: between the hot garage temperatures and the pilot my water runs almost dangerously hot.. The pilot alone keeps the temp. up! I once tried just shutting off the pilot but then the water temp.was way too low. First thing I would suspect (if it is a top entry heater) is a broken off or corroded "dip" tube thatis supposed to put the cold water into the bottom of the tank. The hot water is supposed to come off the top. If the cold water goes in the top instead of the bottom, you will get pre-mixed, warm water instead of hot until the turbulence of the water flow gets the hot water to the top. Good heaters use a "turbulator" tube that makes the water swirl in the bottom of the tank as it enters, avoiding stratification issues. |
#12
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Too much hysteresis in water heater thermostat
On Thu, 6 Feb 2020 10:56:04 -0500, Ralph Mowery
wrote: In article , says... replying to Peabody, rdankwort wrote: This is a very common phenomenon in water heaters. In the morning my temp. is just warm; after I do a load of laundry it is piping hot. And in-between for moderate use. This doesn't make sense. It should be up to its maximum temp when no one has used any hot water. Not after a couple of hours. And if you take a deep bath or very long shower, it should run out of hot water until it has time to heat it again. Sure, but they didn't say they were pulling a very long shower, just a load of laundry. So, it's enough to trigger the WH to fire up and start heating the water again. The water will be the hottest just after the thermostat cuts off. I don't know how much temperature variation the water heaters have, but seems to be a lot on mine and the one I just replaced. They were both tall and had the dual heating elements. I did measure the temperature of my electric oven and it surprised me how much it varied. Seems like at either 350 or 400 deg F it would swing at least 50 or more deg low and high. I worked on instrumentation at a large plant. We had controllers that would hold things with in just a few degrease or less. However the controllers were proportional and not just the 'bang bang' off and on types. I would have thought by now the ovens would have something like that, but I have not seen any in the common house price range. electric and gas are totally different in operation. If it is an electric heater he likely has one bad element. |
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