Question about Rheem RTG-53XP Outdoor Liquid Propane Tankless Water Heater for 1-2 Bathroo

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No hot water; When I open valve, no fan start and no ignitor

I have power to unit, I push "SW1" button inside ; the fan does start !!
Gas valve is open and have 200+gal of propane in tank !!
Unit is only in use 15 months

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Posted on Jan 02, 2017

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muttandjeff
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SOURCE: rheem water heater pilot light goes out

REPLACING THE SPARK IGNITOR WOULD BE MY FIRST GUESS .

Posted on Feb 23, 2009

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SOURCE: 12-year old Rheem residential single-thermostat

TIME TO REPLACE TODAYS ARE MORE EFFICIENT

Posted on Sep 08, 2009

  • 82 Answers

SOURCE: water will not stay hot long enough to

Turn the gas knob up. There's a dial on the front (probably red) and it will have settings on it. A B and C. Turn up to desired temp, but be careful of faucets if there are children in the house. Good luck

Posted on Jan 05, 2010

  • 105 Answers

SOURCE: The hot water will not come on intermitently. I

if your on a private well, it sounds as though your loosing enough water pressure to shut the heater off,.(which is right before the water pump comes on),....tankless heaters turn on by sensing water flow, and of course off when flo stops,......water pressure tanks often need to be re-charged with air for pressure to stay even,....does your water pressure fluctuate?

Posted on Jan 10, 2010

  • 78 Answers

SOURCE: Model 22V40F1 40-gals unit. Pilot lights up OK but won't stay lit

change the thermcouple

Posted on Feb 17, 2010

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2 Answers

We have a reliance sta kleen 805 lp water heater that we installed used and it will not let us go through the start up procedure. i assume its in some kind of lock out mode, it does not respond to hot...


Used, Reliance 805 is power vent gas
10 year old water heater that is newly installed.
Unknown gas control valve.
I'm not a fan of installing old power vent water heaters.
Usually these things are so expensive that old one is only replaced when it fails.

120Volt Outlet must have correct polarity and unit must be grounded between ground prong on cord to manifold tube connected to bottom of gas control valve. Test for continuity with multimeter.

Is this an early FV model with air intake located on bottom?
If air intake is clogged with dust, then combustion chamber overheated and tripped FV system. The older heaters need replacement parts and new gas control valve, or entire heater must be replaced.

Replace gas control valve.
http://waterheatertimer.org/pdf/How-to-replace-water-heater-gas-valve.pdf

Copy following link for gas control troubleshoot by type of gas control.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Post question on Tank forum with more information about type of air intake and gas control valve and history of water heater
http://www.thetankatwaterheaterrescue.com/forums/forum3/

Oct 25, 2012 | RELIANCE ELECTRIC WATER HEATER

1 Answer

The water heater red light keeps flashing rapidly on my Powervent 2 model 41VRP40N. It is not producing hot water and when I read the manual it says it needs more heat. What does this mean. How do I fix...


There are many things to check. The single most important test is for 24V at the gas valve after the ignitor is supposed tp be on. 19 V or less and there is either a bad ground or the ingition control board has failed. (Wire ground problems are a high probablilty)

Here is what the book says:

PROBLEM #1 - HOT SURFACE IGNITOR DOES NOT GLOW RED

(Remember to wait for purge time, 17/34 seconds, on models so equipped).

Possible causes

A. No main power

B. Faulty transformer

C. Faulty thermostat

D. Faulty limit switch

E. Faulty blower interlock switch

F. Faulty hot surface ignitor

G. Faulty ignition control

Solution

Step #1

Perform normal system checks of main power, transformer, thermostat, limit

switch, blower interlock switch, and replace faulty component.

Step #2

With power on and thermostat set at its highest position, check voltage

between "TH" and "TR" on HS780 ignition control. If 24 volts is not present

check output at transformer. If no, replace transformer. If transformer

checks out OK look at other controls in the 24 volt circuit I.E.: thermostat,

limit switch, blower interlock switch. Check for 120 volts between "neut"

(L2) and "120" (L1). Check for 120 volts at the ignitor across "IGN" and

"IGN" terminals on the HS780 ignition module. If 120 volts is present,
replace ignitor. If no, replace the 780 series module

PROBLEM #2 - IGNITOR GLOWS RED BUT MAIN BURNER

WOULDN'T LIGHT

Possible causes

A. Improper ignitor alignment

B. Faulty ignition control

C. Faulty gas valve

D. High inlet gas pressure

E. Polarity reversed

F. No earth ground

Solution

Step #1

Check for availability of gas at gas valve. Make sure the manual valve

upstream of the gas valve and the gas valve are in the full on position. Also

make sure gas is being supplied to the system at the proper pressure, too

high will lock-up the valve.

Step #2

Check proper polarity of "NEUT" and "120" on the ignition control by reversing

the wires, if reversed gas valve will not open. If this does not solve the

problem, replace wires as they were.

Step #3

Check for proper ignitor position.

Step #4

Check for a good earth ground by using a meter connected between L1

and furnace chassis. Should read 120 volts, if no, check and/or repair ignition
ground wire or ignition control mounting screws.
CAUTION POLARITY MUST BE OBSERVED

Step #5

Check for 24 volts at the gas valve terminals; "1" and "2" on a 7200 series,

"M" and "C" on a 7100 series, "TH" and "TR" on a 7000 series. If yes,

check wire integrity or change the gas valve. If no, change the 780 series
ignition module.

That is pretty much all of the troubleshooting required.

Thanks for choosing FixYa,
Kelly

Feb 14, 2011 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

Can't get the pilot light to start


Is this the newer style with closed combustion chamber. If so I would check to make sure that spark ignitor is working. If not it will need replaced. If ignitor is workingthen loosen compression nut on line to pilot and temporarily depress button on gas valve to make sure you have gas at that point.If you have gas there and tighten compression nut to pilot back up and it still won't light then you will need to remove screws that hold cover on burner compartment.Shut off valve to gas supply and remove gas line from gas valve remove pilot and thermocouple lines. Slide burner out ofcompartment and clean it .Remove nut from bottom of pilot assembly and clean out pilot orifice. Blow through pilot line to make sure it's all clear
Reassemble everthing using teflon tape or pipe joint compound as needed.Turn gas supply valve on and check for leaks.Set gas valve control to pilot and depress pilot button and hold. While you are holding button done push spark ignitor every few seconds until it lights. thank you and good luck

Dec 22, 2010 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

No hot water after installation and powering up


All water valves open? Unit will flow approx 3/4 gallon prior to starting. If flow is good, check the flow switch to see if it is closing. If flow switch is closing and unit still not firing, assuming gas pressure is good; Nat 3.5''w.c., LP 10" w.c., loose wiring at board, ignitor. Sounds like something simple overlooked.

Jul 12, 2009 | Rheem Tankless Hot Water Heater...

1 Answer

Rheem/GE power vent water heater, pilot lites, but not the main


I would check to see if the switch on the blower pressure sensor is closing...When T-stat calls for flame, the circuit starts the blower, then the blower pressure sensor switch closes to allow the main gas valve to be powered.

Jul 08, 2009 | Water Heaters

1 Answer

Rheem 40 gal power vent gas water heater shows code 42


you plugged it in and the fan started or you unplugged it and the fan started,,the fan will come on first before the unit will inginte to take out the excess gas, if it didn't lite then the ignitor might not be working there are 2 swithces on the unit one on the fan and one by the gas valve make sure they are both on and make sure the gas it also turned on.

May 30, 2009 | Water Heaters

1 Answer

I have a Sime Super 90 Combi Boiler. How do I start the pilot light? Thanks


does it have a little red button on the right hand side of the gas valve? if so you must put the gas valve button in the pilot positon and push it down and hold it, then click the red button {push it down} it will click and look at it keep clicking while holding down the button on the gas valve eventually when the gas gets thru it will light could take several clicks of the ignitor

May 18, 2009 | Water Heaters

1 Answer

Trying to find out if my new hot water heater is shot


The red button you pushed on the hot water heater was probably what is called a "piezo-electric" ignitor. It's normal for it to make a snapping sound and then pop back out. It sounds like you just lost the pilot light.

That being the case, do this:

Turn the gas valve on the hot water tank to the "off" position - it should be silver in color and down low on the tank. You may have to push it down to do this
Leave it off for about two minutes or so
Rotate the valve back on to the "Pilot" position
Hold down the pilot gas valve - it should be red and immediately to the left of the main gas valve.

While holding the pilot gas valve down, push the other red button to the right of the main gas valve - this is the piezo ignitor - push it several times in a row quickly

The gas pilot light should light
You can stop pushing the ignitor now, but continue to hold down the gas pilot valve (the one just left of the main gas valve). Let this valve up after about another 20 seconds or so.

Now rotate the main gas valve to the "on" position

Listen carefully - you should hear the main gas light and feel heat at the water heater flue outlet on top - don't touch it with your hand - you could get burned

If no luck, repeat the process until the heater re-lights

TIP - the instructions for re-lighting the pilot should be written on the heater

Just a potential diagnosis - the thunder clap, if as close as you describe, may have been intense enough to create what is known as a "draft inversion" that may have snuffed out your pilot light. The air pulse came down the flue pipe.


Apr 08, 2009 | American Standard Water Heaters

1 Answer

Eractic Power Vent Gas Water Heater


Th epproblem you are most likely have is from a safety called a flag switch usually located either in the blower or right past it. When you unplug and replug you reset the switch. Sequence of events.  1 fan comes on. 2 switch is made from the airflow of the fan.  3 ignitor come on 4. main gas valve opens and ignitor starts flame. 
You are being stopped at step 2 when the fan does not move with the air. This shuts off and out the water heater from calling again.  Find the fan switch and make sure it moves easily. They get dirty and also dry from lack of lube. Good luck.  

Mar 16, 2009 | Water Heaters

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