Question about Raypak RP2100Digital Gas Heater Control Panel

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Heater goes on and off

Check hi limits and pressure switch no problem

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If wired 120 volt check wiring

Posted on Apr 27, 2016

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Posted on Jan 02, 2017

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1 Answer

How to check if you have a bad pressure switch or hi limits are not on correctly


check to see if pressure switch has 24 volts on both sides if not check copper syphon loop to see if plugged

Oct 03, 2014 | Pool & Spa

1 Answer

Furnace problems


On - OK
1 Blink - Ignition failure. Check Gas flow, gas pressure, gas valve, flame sensor.
2 Blinks - Closed pressure switch. Check pressure switch (stuck in closed position).
3 Blinks - Pressure switch - failre to close. Check venter, pressure switch, vent blockage.
4 Blinks - Open limit switch. Main limit or aux limit are open. (My comment - Means overheating in chamber. Often result of blocked intake air. Bad filter. In my case, plastic wrap had been sucked into the intake. )
6 Blinks - False flame sensed. Check sticking gas valve.
Rapid continuous blinking - Incorrect twinning, incorrect primary polarity. Reverse transformer secondary leads, reverse primary wires.

Closed pressure switch can be from dirty combustion vents, bad chamber pressure - like missing screws, maladjusted gas pressure, failing pressure switch, loose hoses, moisture in the hoses or fan blades The switch need to be closed to ge the unit to work

Jan 23, 2008 | Goodman GMS90703BXA Heater

1 Answer

RAYPAK RP2100 HIGH PRESSURE LIMIT


check gas pressure then replace highlimit rollout switch if ok replace hi limits in header

May 04, 2012 | Raypak Rp2100 Digital 336k Btu Propane...

1 Answer

PSE+G stated the problem was diagnosed as a pressure swith on my Goodman heater....any suggestions to fix? Is this an expensive job?


How do you test a pressure switch and other limit controls? This is for people who are experienced with electrical equipment and the use of a Volt Ohm meter. *Please never by pass a pressure switch or limit control. The pressure switch and limit switches are there for your safety. If you have an open limit control either the furnace has over heated or the limit has gone bad. Problems that would make a limit open up would be dirty filters, dirty evaporator coil causing a restriction in the air flow or a slow blower motor (check the capacitor on the blower motor to make sure it is good). A weak blower motor capacitor will cause the blower to run slow and eventually fail. Pressure switches, and limit switches can be tested with a meter in the same manner. With the furnace calling for heat you can test each of the terminals on the pressure switch to ground to make sure the pressure switch is closed. You should be getting between 24 to 28 volts from each terminal to ground if the pressure switch is closed. If the pressure switch is open you either have a stopped up vent, drain line (if you have a condensing furnace) or bad pressure switch. Please keep in mind there are many different types. The front terminal is burnt and discolored. This is a clue that this pressure switch has a problem.

Dec 22, 2010 | Goodman GMS90703BXA Heater

1 Answer

Heater fires up and is hot but does not heat the water. Raypak Versa bronze


This unit must have adequate water flow and apparently needs to be checked for proper operation.

Consider the following:

The unit as manufactured is equipped with:
  • pressure switch - likely stuck in the on condition, or been has been bypassed
  • Thermostat - Needs to be checked to insure it is properly working and calibrated.
  • Hi-limit switches - need to be checked to insure they are working and not bypassed.
  • flame sensor - prevents flame from leaving the firebox and damaging control area. (if equipped)
  • Flow Governor - controls water flow through the heat exchanger to prevent over pressure.
If the pressure switch is working properly, a blockage after the heater, would create pressure, but not enough flow. Check for a closed valve or obstruction in the plumbing.

If the problem is a clogged filter, and the filter is located before the heater, then the pressure switch is NOT working correctly and needs to be replaced or adjusted to factory settings. Remove the filter cartridge and check for flow.

Bottom line is:

No flow and no pressure, - heater should not come on.
No flow, but pressure, heater would come on and overheat, tripping hi-limit.
Good flow, heater would come on and spa would heat.

Nov 26, 2010 | Raypak Hood shown but not included. A...

1 Answer

Maybe 4-7 years old I have installed more than three hundred furnaces in my time of electrical construction/heating.When furnace has no call for heat, and the thermostat wires are taken off circuit board...


Hi,
You need to check the limit switches with a meter...
What you are getting there is a classic lock out condition from an open limit switch....there could be two or three limit switches depending on make and model that you have there...
Something is open in the safety circuit...

heatman101

Oct 26, 2010 | Heating & Cooling

1 Answer

Getting LO error


Lo is an error code dealing with the safety loop, hi limit switches, water pressure switches. Check for continuity and the wiring between the hi limit switches and the water pressure switch. Also, check to make sure the filter is clean and the pump basket is empty. These also can cause a low flow situation that will cause the pressure switch to not close properly.

May 23, 2010 | Hayward 250kbtu Ng Pool Heater - Inground

2 Answers

Gettin LO error on display


Lo is an error code dealing with the safety loop, hi limit switches, water pressure switches. Check for continuity and the wiring between the hi limit switches and the water pressure switch. Also, check to make sure the filter is clean and the pump basket is empty. These also can cause a low flow situation that will cause the pressure switch to not close properly.

May 23, 2010 | Hayward H-series Electronic Gas Pool...

1 Answer

I HAVE A CRAFTSMAN 1 HP 12 GAL AIR COMPRESSOR THAT WILL ONLY BUILD 20 PSI THE COMPRESSOR ONLY HAS 1.5 HRS RUN TIME ANY SUGESTIONS


hi there, if the compressor built up a 20 psig and run at 1.5 hrs.then stop.check the pressure switch the differential pressure cut in and cut out limit.adjust the cut out to the corresponding cut out pressure you want but not exceed to the designed pressure tank..this will be done on adjusting cut out pressure screw mounted inside the pressure switch.follow the instruction on the manuals adjusting pressure switch.the run time correspond to the cut out limit of the pressure switch. rate my fix if your satisfied thank a lot.

Apr 20, 2010 | Air Tools & Compressors

1 Answer

LO error message on heater. Everything shuts off after a few minutes of running.


On of your limits is not working or not wired up. An easy way to check the limits - Water pressure switch, Hi limits, air pressure switch all of which have 2 wires going to them. Unplug one item and connect the 2 wires together ( paper clip works fine ) Then retest, if problem does not go away remove paper clip and reconnect wires and move to the next limit. Always make sure water is flowing through the heater at all times while checking the limits.

Feb 17, 2010 | Hayward H Series Pool & Spa Heater 400k...

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