Question about Goodman GMS90703BXA Heater

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Had a power outatge... the power is back, but no hot water

I have a goodman tankless water heater. my neighborhood lost power last night. power was restored, but i have no hot water. i just the circuit breaker, but no luck.  help... i need a hot shower.

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  • jamisonbryan Feb 09, 2009

    everything looks connected... any other ideas?

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There is a fuse inside the case that you open on the bottom of the tankless water heater. Check to make sure it was not popped

Posted on Feb 09, 2009

  • Jeremy Reddick
    Jeremy Reddick Feb 09, 2009

    Is this electric or gas?

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Rinnai r85 exterior propane tankless water heater makes knocking/clicking noise. seems it tries to start with clicking noise then no fire in burners then cycles again. no error message. have two rinnia...


on start up the clicking noise is normal as well as knocking noise ....one important item with fan , if the fan was removed cleaned and then reinstalled with power to unit could have ruined the fan and it will have to be replaced..... Cant tell you why is wasn't firing before with no codes...other than flow sensor not working( most likey stopped with sand fragments or trash) the flow sensor detects hot water demand and ignites heater and if clogged it will not light up but doesn't give error code and the water running through hot side will be cold..... flow sensor is a turbine that detects water movement and lets heater light..... may want to get serviceman to check this out and clean turbine.... hope this helps...

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Tankless Hot Water Heaters When is The Time and the Place to Use Them


In the past few years the tankless hot water heater has become much more popular. Should this type of water heater be used all the time for every job or is there some places that they just are not the right tool for the job?

Your water heater is something that you depend on everyday to give you a constant supply of hot water for the many things that you do. If you are building a new home or are just looking to replace an existing hot water tank then you need to look at all the possibilities to make a good decision about what your nest appliance should be.

Tankless or instant water heaters are a great way to make hot water. They will provide you with a constant somewhat limited supply of hot water. This means that the flow of the water is limited. Because of the way they heat the water instantly the volume of water running through the heater has to be controlled to get the temperature rise that you desire. The tankless water heater does not store any hot water. When it detects a flow of water in the water pipe the heater turns on and then it shut off when the flow stops. This feature will save energy if you only use water intermittently.

The downside of this type of water heater is seen if you need large flows of water at one time. The amount of fire that is needed to heat large volumes of water quickly is very high and it kills the efficiency that you expect from the unit. Also if you are continually using water then the instant water heater is not the way to go. Because the heater makes hot water so fast a high BTU flame is needed and the instant efficiency is not very good. The savings of this type of heater comes from it not storing water and keeping it hot from long periods of time till it is needed.

So if you are just using hot water a couple of times a day and most of the time the heater is just sitting there waiting for you the instant water heater may save you money. If you are using water a lot of the time or are using large volumes of water quickly then it probably will not be the appliance that you want. Also remember to check on the pricing of these tankless hot water heaters. They are very expensive to buy and install, often costing twice what a normal tank type heater would cost. Check to see if your pay back will be enough to cover the difference in the cost. In many situations the savings will be enough to justify the extra cost. And many times the savings will not be there. You need to research your options and make an informed decision.

Tankless hot water heaters are not well suited for every situation, but in many cases they are a very good money saving option.

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I have a GMPN120-5 goodman furnace that was working fine until last night now the furnace will not do anything at all and I mean absolutely nothing. Please help me with this so that I could keep my...


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Went to bed last night with heat woke up today everything house was cold, looked at thermastat it said 63degrees,, checked out furnace it starts up but doesnt ignite, sounds like its in the start up stage...


Does the hot surface igniter glow? If not, it is probably cracked. If this is
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Question, is there any other equipment that uses propane? You indicate that the problem started after a delivery of propane after running out. If so, I suspect a blockage in either the gas train or the rinnai itself. If tou have the temperature control that regulates the water temperature, you can recall error codes to pinpoint the issue. They are optional equipment so if you can wire one in or ask your propane gas supplier if their service department has one, it will aide in the diagnosis.

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