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I have a Rheem Spyderfire 100 gallon gas heater and it won’t…

Customer Question
I have a Rheem Spyderfire...
I have a Rheem Spyderfire 100 gallon gas heater and it won’t turn on. There is power to the switch and when turned on there is power going out of the switch to the motor etc. Any thoughts.
Submitted: 8 months ago.Category: Plumbing
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Answered in 1 minute by:
12/11/2017
Plumber: Rick, Construction Supervisor replied 8 months ago
Rick
Rick, Construction Supervisor
Category: Plumbing
Satisfied Customers: 24,621
Experience: Licensed Master plumber with 40+ yrs. experience.
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Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. First I’ll need some more info so I have a more complete picture of your situation. I need the actual model number of your unit. It's on the rating tag

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Customer reply replied 8 months ago
Sorry the model is
GHE 100-200
Plumber: Rick, Construction Supervisor replied 8 months ago

Is the fan motor running (you said it has power to it?)?

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Customer reply replied 8 months ago
No the fan motor usually would run but it is not on at all. Nether is the display.
Plumber: Rick, Construction Supervisor replied 8 months ago

Check the connection for the wiring harness to the board.

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Customer reply replied 8 months ago
I removed and re inserted the harnesses for all the connections on the board.
Customer reply replied 8 months ago
Any specific things to look for on harness?
Plumber: Rick, Construction Supervisor replied 8 months ago

Nothing you can check aside from the connection. How old is the unit?

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Customer reply replied 8 months ago
Less than 3 yers.
Customer reply replied 8 months ago
I have already hanged the controller box and display once.
Plumber: Rick, Construction Supervisor replied 8 months ago

I asked in case it was under warranty. It's not for parts. I'd replace the wiring harness.

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Customer reply replied 8 months ago
Ok I’ll try that but does that explain the display and all?
Plumber: Rick, Construction Supervisor replied 8 months ago

Yes, bad harness connection can = no display

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Customer reply replied 8 months ago
Which specific harness should I focus on?
Plumber: Rick, Construction Supervisor replied 8 months ago

The one between the controller and display

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