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Guests 
Guest Group 
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 Topic: Water heater switch lightPosted: 24 Aug 2015 at 9:22pm |
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Is the water heater switch supposed to light up when turned on like the water pump switch?
Mine does't. I have only used 110v so far but I did notice the 12v/propane switch didn't light up when I was checking stuff out. I haven't had time to delve into it but will be needing the propane side this weekend.
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CharlieM
Senior Member 
Joined: 23 Nov 2012 Location: N. Colorado Online Status: Offline Posts: 1797 |
Posted: 24 Aug 2015 at 10:08pm |
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The WH light will come on when you turn the switch on if the burner is needed. If it comes on it should go out within 15 seconds, indicating the burner has ignited. If it stays on, indicating no ignition, recycle it by turning off and back on until it goes out and stays out. Make sure the gas line has been bled of air.
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Charlie
Northern Colorado OLD: 2013 RP-172, 2010 Honda Pilot 3.5L 4WD PRESENT: 2014 Camplite 21RBS, 2013 Supercharged Tacoma 4L V6 4WD |
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Guests
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Posted: 25 Aug 2015 at 6:06am |
That's my point... The light NEVER comes on.
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CharlieM
Senior Member
Joined: 23 Nov 2012 Location: N. Colorado Online Status: Offline Posts: 1797 |
Posted: 25 Aug 2015 at 6:50am |
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If the WH is cold the light should come on momentarily when you turn the switch on. If it doesn't check for a blown fuse. If the WH is cold you should be able to hear the burner ignite and burn if you stand outside by the WH. If not, look for trouble. From what you describe I'd look for lack of 12V (fuse).
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Charlie
Northern Colorado OLD: 2013 RP-172, 2010 Honda Pilot 3.5L 4WD PRESENT: 2014 Camplite 21RBS, 2013 Supercharged Tacoma 4L V6 4WD |
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Outbound
podders Helping podders - pHp
Joined: 19 Nov 2009 Location: Oshawa, Ontario Online Status: Offline Posts: 767 |
Posted: 25 Aug 2015 at 9:37am |
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The water heater light only comes on if there is a problem igniting the burner. Otherwise, it'll stay off.
As CharlieM said above, you will see the light for a few seconds as the burner is lighting (gas on, sparker sparking, but burner not yet ignited), it will turn off when the burner has lit.
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Craig :: 2009 RP171 towed by a 2017 F150
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Guests
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Posted: 25 Aug 2015 at 9:46am |
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Thanks, guys... I'll check the 12v fuse
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CharlieM
Senior Member
Joined: 23 Nov 2012 Location: N. Colorado Online Status: Offline Posts: 1797 |
Posted: 25 Aug 2015 at 10:00am |
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One other thing to check: If the fuses are good and still no joy, check the thermal limit switches. On the WH there are two buttons to reset the thermal protectors, one for 120V and one for gas. Push both in to reset.
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Charlie
Northern Colorado OLD: 2013 RP-172, 2010 Honda Pilot 3.5L 4WD PRESENT: 2014 Camplite 21RBS, 2013 Supercharged Tacoma 4L V6 4WD |
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techntrek
Admin Group - pHp 
Joined: 29 Jul 2009 Location: MD Online Status: Offline Posts: 9062 |
Posted: 25 Aug 2015 at 11:37am |
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You said in the original post you've been using the electric element. If you tried turning on the propane mode when your water was already hot, you wouldn't see that light come on.
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Water heater switch light