Jandy Heating & Cooling - Recent Questions, Troubleshooting & Support

If it has a pilot, it is not adjusted close enough to the burner, so a delay in ignition. If it is an electric ignition a similar situation exists.

You're probably right about the thermocouple, though the size of the pilot flame is also influential, as it generates the electricity to keep the valve open. So you have two options, first I'd try increasing the size of the pilot (there's typically an allen hole for that on the gas valve). If that fails replace the thermocouple. Remove the pilot apparatus, then yank on the thermocouple until it comes out (or bash the top of it), I haven't yet seen one with a locking device. the new thermocouple will slip in right in the same place as the old one. Be sure that the pilot flame will engulf as much of the thermocouple as it can. The new one will also plug in the same way at the gas valve.
One thing to be careful of when removing the apparatus is the pilot gas supply, it's a stiff tube, it will bend but be careful, it will also break if you bend it too far. Best of luck to you.

check too see if you are getting signal back too control brd if you are replace the control brd

Turn off the power and carefully install a jumper wire
around the switch, in other words take the switch out
of the circuit. If you dont feel comfortable doing this
have a certified electrician help out.

I have the same problem, removed the heat exchanger and found a small rubber gastket that was ripped. The gaskets can be found at parts store. Set of 18 about $20.00.can.

Your controller board has gone bad, check with the dealer you bought it from and see if its under warranty, and/or they have a replacement board. Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

Just to verify, is that a Jandy gas heater? If yes:

Twist the wing nuts off the panel that houses the filter and remove the panel. Pull the filter down and to the right to remove it, then clear any blockages in the area that houses the filter. Adjust the pressure switch, install the filter back into its housing and screw the panel back into place. Contact qualified service personnel to replace the pressure switch if adjusting the switch does not solve the problem.

Thank you and good luck!

Hi, if you are able to jump across the gas valve coil and the valves stays open and heater keeps working, the main coil that you are by passing is faulty. This is all that it could be as this is how we test parts and switches is by jumping them out. This will tell you that the switch is bad, in your case the coil is bad. I wouldn't leave it jumped out it is dangerous, it needs to be replaced, the gas valve.
Shastalaker7
A/C, Heating Contractor

If the pilot is on the thermo couple is ok. Could possibly be a faulty temperature limiting switch, it may be stuck and just needs a spray of WD40 or similar product. Then again I could be completely wrong.

Heat pumps work the same way as a refrigerator, just in reverse. Because they do, they are dependent upon refrigerant. If the refrigerant is low this could be the cause of the unit not functioning.