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Atwood marine water heater

T
twlldeen@gmail.com
Mon, Sep 13, 2021 12:46 AM

I usually only park up for a day or two before moving on and my heat exchanger keeps my hot water plenty warm/extremely hot.

I never bothered switching on the power to the Atwood marine heater, except this last week I was at a campground with hookups (first time ever hooked
up) so I plugged in. After a couple of days, the hot water from running the engine was used up/cold so I switched on the power to the unit. After
about 3 hours, I turned on the hot water tap and the water hadn't warmed up at all so it looks like the heater isn't working.

Is there a reset button on this unit or some switch other than the main switch near the breaker box?

TIA

Larry

--
Larry - Victoria BC -

1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system,
6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses

I usually only park up for a day or two before moving on and my heat exchanger keeps my hot water plenty warm/extremely hot. I never bothered switching on the power to the Atwood marine heater, except this last week I was at a campground with hookups (first time ever hooked up) so I plugged in. After a couple of days, the hot water from running the engine was used up/cold so I switched on the power to the unit. After about 3 hours, I turned on the hot water tap and the water hadn't warmed up at all so it looks like the heater isn't working. Is there a reset button on this unit or some switch other than the main switch near the breaker box? TIA Larry -- Larry - Victoria BC - 1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system, 6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses
MC
Matt Colie
Mon, Sep 13, 2021 1:00 AM

boybach wrote on Sun, 12 September 2021 20:46

I usually only park up for a day or two before moving on and my heat exchanger keeps my hot water plenty warm/extremely hot.
I never bothered switching on the power to the Atwood marine heater, except this last week I was at a campground with hookups (first time ever
hooked up) so I plugged in. After a couple of days, the hot water from running the engine was used up/cold so I switched on the power to the unit.
After about 3 hours, I turned on the hot water tap and the water hadn't warmed up at all so it looks like the heater isn't working.

Is there a reset button on this unit or some switch other than the main switch near the breaker box?

TIA
Larry

Larry,

Many have a resettable over heat control that is tripped by a 190° thermostat. Get in there and look for a red button.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

boybach wrote on Sun, 12 September 2021 20:46 > I usually only park up for a day or two before moving on and my heat exchanger keeps my hot water plenty warm/extremely hot. > I never bothered switching on the power to the Atwood marine heater, except this last week I was at a campground with hookups (first time ever > hooked up) so I plugged in. After a couple of days, the hot water from running the engine was used up/cold so I switched on the power to the unit. > After about 3 hours, I turned on the hot water tap and the water hadn't warmed up at all so it looks like the heater isn't working. > > Is there a reset button on this unit or some switch other than the main switch near the breaker box? > > TIA > Larry Larry, Many have a resettable over heat control that is tripped by a 190° thermostat. Get in there and look for a red button. Matt -- Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms SE Michigan - Near DTW - Twixt A2 and Detroit
T
twlldeen@gmail.com
Mon, Sep 13, 2021 2:08 AM

Thanks Matt, will do!

Is it possible that the engine temp exceeded 190° via the heat exchanger and THAT tripped the thermostat even though the heater wasn't actually
"on"?

Or is that impossible?

Larry

Larry - Victoria BC -

1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system,
6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses

Thanks Matt, will do! Is it possible that the engine temp exceeded 190° via the heat exchanger and THAT tripped the thermostat even though the heater wasn't actually "on"? Or is that impossible? Larry -- Larry - Victoria BC - 1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system, 6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses
JR
John R. Lebetski
Mon, Sep 13, 2021 2:12 AM

Yes. The safety sat does not know where the heat came from, just it’s over temp.

John Lebetski
Woodstock, IL
77 Eleganza II

Yes. The safety sat does not know where the heat came from, just it’s over temp. -- John Lebetski Woodstock, IL 77 Eleganza II