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gas water heater question #4659341
02/07/18 06:57 PM
02/07/18 06:57 PM
Joined: Mar 2004
Posts: 20,758
Upstate NY
Donald Online content OP
Donald  Online Content OP
Joined: Mar 2004
Posts: 20,758
Upstate NY
My home in DE has about a 60 gallon gas water heater. When I leave I turn the thermostat down to minimum, probably 90F. When I return a few weeks latter I turn it to mid point, maybe 140F. I assume the gas flame heats the water in the bottom and by convection the heat moves up to the 90F water at the top of the tank until the whole tank is 140F.

How long should the process take? It seems to take overnight. I would think it would take less than 1 hour.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: gas water heater question [Re: Donald] #4659356
02/07/18 07:12 PM
02/07/18 07:12 PM
Joined: Mar 2013
Posts: 4,777
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,777
The Midwest
Maybe the dip tube is shot?


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: gas water heater question [Re: Donald] #4659357
02/07/18 07:13 PM
02/07/18 07:13 PM
Joined: Jan 2009
Posts: 6,205
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,205
New England
You just told us how long it takes. happy

Last edited by gathermewool; 02/07/18 07:18 PM.

'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter
Re: gas water heater question [Re: Donald] #4659378
02/07/18 07:34 PM
02/07/18 07:34 PM
Joined: Apr 2013
Posts: 5,784
FL, USA
gregk24 Offline
gregk24  Offline
Joined: Apr 2013
Posts: 5,784
FL, USA
Mine is a 30 gallon unit, and even after running all the hot water out (after showers / dishwater / etc.) it doesn't take very long to heat back up to the desired temperature. Maybe 30 minutes.


2012 Honda Accord EX-L K24z3
54,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
40,xxx miles
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Re: gas water heater question [Re: Donald] #4659411
02/07/18 08:00 PM
02/07/18 08:00 PM
Joined: Apr 2012
Posts: 5,158
MA
Wolf359 Offline
Wolf359  Offline
Joined: Apr 2012
Posts: 5,158
MA
Whatever the recovery rate of the water heater is. Typically it would say something like 60 gallons in an hour or something like that. If it takes all day, it's taking too long and there's something wrong. Dip tube, thermostat, sediment, bad burner, gas pressure, etc.

Re: gas water heater question [Re: Donald] #4659416
02/07/18 08:07 PM
02/07/18 08:07 PM
Joined: Nov 2016
Posts: 395
Texas
BalticBob Offline
BalticBob  Offline
Joined: Nov 2016
Posts: 395
Texas
It should take no more than an hour.
If it is a old water heater and/or you have hard water, sediment in the tank bottom is like an insulator. Has the tank been drained once a year to flush the sediment? If it has never been flushed, the drain valve will be clogged. If it is, you may be able to use a stiff wire to break the clog loose. It is a chore.

Re: gas water heater question [Re: Donald] #4659450
02/07/18 08:48 PM
02/07/18 08:48 PM
Joined: Mar 2004
Posts: 20,758
Upstate NY
Donald Online content OP
Donald  Online Content OP
Joined: Mar 2004
Posts: 20,758
Upstate NY
Once the temp is up to the set temp, it works fine. It seems to be something with turning up the temp from low to mid.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: gas water heater question [Re: Donald] #4659537
02/07/18 10:06 PM
02/07/18 10:06 PM
Joined: Oct 2015
Posts: 440
MN
TmanP Offline
TmanP  Offline
Joined: Oct 2015
Posts: 440
MN
We do the same with a 40 gallon gas whenever we're gone for more than a couple days.
It takes 30 minutes or so until you get some warm water, the thermostat shuts it off 45 min to an hour after turning it back up.


2012 Toyota Camry 2.5 30,000 mi
2015 Chevy Silverado LT Z71 5.3 V8 30,000 mi
2010 Toyota Sienna 3.5 V6 150,000 mi
Re: gas water heater question [Re: Donald] #4659541
02/07/18 10:09 PM
02/07/18 10:09 PM
Joined: Apr 2012
Posts: 5,158
MA
Wolf359 Offline
Wolf359  Offline
Joined: Apr 2012
Posts: 5,158
MA
Then it could be temperature probe. You can replace those, but they go inside the water heater so you should either drain it or do it when it's cold as some water can come out. If it's under warranty, they'll usually send you the part but labor is typically only one year so you'll have to find a plumber to do it if it's over a year old. Or if it's not, then who knows what that part goes for, might be time for a new one.

Re: gas water heater question [Re: Donald] #4659585
02/07/18 11:09 PM
02/07/18 11:09 PM
Joined: Mar 2008
Posts: 5,841
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,841
South Florida
I have a 40 gal electric that I turn off when I go on vacation for a few days or more. It takes less than an hour to go from full cold to full warm when I turn it back on. Gas should be similiar.


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30


Re: gas water heater question [Re: Donald] #4659615
02/08/18 12:05 AM
02/08/18 12:05 AM
Joined: Jul 2017
Posts: 309
PR CA, USA
2strokeNorthstar Offline
2strokeNorthstar  Offline
Joined: Jul 2017
Posts: 309
PR CA, USA
Age and condition is the determining factor.

Re: gas water heater question [Re: Donald] #4659624
02/08/18 01:30 AM
02/08/18 01:30 AM
Joined: Jun 2012
Posts: 1,704
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,704
USA
Do you drain some water out every spring to keep the rust/sediment from impeding the heat? I use the hose off the AC. I let it run wide open for about 30 seconds. My Dad said to do this many years ago.




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