Raypak Popular Questions, Answers, Tips & Manuals

The error codes and buzzing sound you are experiencing with your Raypak RP2100 heater indicate potential issues with the ignition and flame sensing components. Here are some troubleshooting steps you can take: 1. Check Gas Supply: Ensure that there is an adequate supply of gas to the heater. Make sure the gas valve is fully open and that there are no obstructions or leaks in the gas line. 2. Inspect Ignition System: The CFH (Call For Heat) and SPK (Spark Ignition) codes suggest that the heater is having trouble igniting. Inspect the ignition system components, including the spark electrode, ignition control module, and wiring connections. Clean any debris or corrosion that may be affecting the spark ignition. 3. Check Flame Sensor: The buzzing sound you hear could be related to the flame sensing system. The heater may not sense the presence of a flame, causing it to shut down. Inspect the flame sensor for any buildup of soot, debris, or corrosion. Clean the flame sensor using a soft cloth or a non-abrasive brush. 4. Verify Proper Ventilation: Ensure that the heater's venting system is clear of any blockages. Blocked vents can lead to incomplete combustion and affect the heater's ignition process. 5. Consult the Owner's Manual: Refer to the owner's manual for your specific model of the Raypak RP2100 heater. It may provide additional troubleshooting steps and error code explanations that are specific to your unit. 6. Seek Professional Assistance: If the issue persists or you are unable to resolve it on your own, it's recommended to contact a professional technician who is experienced with Raypak heaters. They will have the expertise to diagnose and repair any complex issues with the ignition system. Remember, dealing with gas appliances can be dangerous. If you are not experienced with working on gas heaters, it is best to contact a qualified professional to ensure proper troubleshooting and repairs.

It sounds like there may be a problem with the temperature sensor on your Raypak 399L spa heater. The "sensor failure" message indicates that the heater is not able to detect the temperature of the water in the spa. This can prevent the heater from starting up and operating properly. Here are a few things you can try to troubleshoot the issue:

1. Check the wiring: Make sure all of the wiring is securely connected and there are no loose wires or damaged connections.
2. Check the temperature sensor: The temperature sensor is typically located in the heater itself. Make sure it is securely fastened and there are no visible signs of damage.
3. Test the temperature sensor: Some models of the Raypak 399L have a diagnostic feature that allows you to test the temperature sensor. Consult your owner's manual or a service manual for instructions on how to do this.
4. Replace the temperature sensor: If the temperature sensor appears to be damaged or is not functioning properly, you may need to replace it. This will typically require the help of a qualified service technician.

I hope this information is helpful. If you have any further questions or need additional assistance, don't hesitate to ask.

Hi, Please be careful when dealing with products using gas. Double check that the area around where ignition occurs does not have air blocked off as low oxygen would stop fire from occurring. You can also check fuel level of machine. Thank you.

check gas pressure if ok when goes out possible overheating and shutting off

check gas pressure before and after valve when cycling

Check the circuit breakers in the main house box. It may have tripped due to an overload.

sensor failure possible chemistry out of balance header leaking possible overheating check gas pressure also for blocked burner tube

There is a transformer in that unit to convert the high power to probably 24 volts. If it is still working when it is buzzing, the problem is most likely the lamination in the transformer core is loose and vibrating.

Check voltage to the gas valve and make sure it is getting 22-30 bolts when the gas valve opens. Also make sure the regulator is supplying the proper amount of gas per heater specs. Too much gas will make the valve chatter.

That model is obsolete. HP means high pressure, there is a switch on the discharge side of the pump that is tripped and it wont allow the unit to come on.

This is very common with Raypak. What you hear is the way the air flow drafts through the heater. Raypaks typically draft very well. The rise of the heat off the burners draws in fresh air at the bottom and sides of the heater through the louvers and expels out the top. You need the right mixture of fuel and oxygen for efficient burn and proper draft. A week flame or inefficient fresh air and the heater will not draft properly. A 406 is a very big heater my initial reaction is to check the gas supply. My assumption is the gas line may be undersized, especially if this heater was recently installed in place of a smaller unit. If the gas line is undersized the heater may operate but in time the insides will soot like a chimney and also change the dynamics of the way it drafts. Soot can also be a fire hazard so it is worth having a professional take gas pressure readings.

All fine that the thermostat clicks when tuned, However just check the contact for Voltage as the contacts do get burnt at times, thus your element is not getting sufficient voltage

Heater cool down is very important and needs to be done. A time clock with a firemen switch is how it is normally done. Never run a heater with out water flowing thru it.

I would check the sensor wiring on side of unit where the inlet and return manifold is - chances are little critters chewed the wires to the sensors. may need to replace the wires if they are too mangled, or can try to splice

If your heater clicks then it does not have a pilot.
It is most likely an electronic ignition.

When you turn it on, have the front cabinet open and look at the igniter, you should see a spark as it clicks.

Typically this heater display will give an error code of some sort which will point you in the right direction.

Basic things to check.
Ensure good flow
Ensure gas valve is open
No loose wire connections
No mice or rat issues internally

I can't help more without having more information

If it is new I would call Raypack. The issues to consider that could be causing your problem range very widely from as simple as "no power to unit", to a bad board.

Make sure your ribbon cable from the pad to board is connected and well seated.

If you are referring to the TAB for LP vs NG then yes remove tab before install, makes it easier.

If your lucky its leaking from the drain plug or pressure switch. Take the sides off the heater. If its a simple fix you will now be able to see the leak, and should be able to make the repair yourself. if not it is undoubtedly the heat exchanger. Rheem/Raypak calls it tube bundle. I suggest a repair technician for this as there is internal parts to inspect and look for proper operation. At least now you will have the knowledge beforehand when the technician comes and says its a 1000.00 repair its not a simple lucky fix he should have caught for a faction of the cost.

Possible defective gas valve