Jandy versatemp jrt3000 temp sensor failure

[nighthawk4900]

I have a Jandy versatemp jrt3000 heater/chiller heatpump and it seems the temp sensor has failed (h2o sensor error) but the videos and diagrams are all for an older model where the sensor is right in the front.

In the new model, the access panels comes off the front to reveal the electrical box, but the actual temperature sensor on the inlet pipe is WAY in the back and essentially on the floor. Doesn't look like any of the rear panels come off to give access to this area (there are no other panels at all).



My only thought is to maybe take off the fan from the top and try to reach down...but it's literally the entire height down. Any other thoughts?

 

[ajw22]

Welcome to TFP.

That may be what it takes.

I have not had my head in a Jandy heat pump but my Trane AC units require that type of gymnastics for some repairs. Easy repair access is often not a design objective.

 

[JamesW]

Maybe you can install the sensor in a more convenient place?

What if you left the old sensor in place and just installed a new sensor in the inlet pipe?

Note that there might be issues with this approach, so I am not recommending it; I am just suggesting something to consider.

 

[JamesW]

 

[nighthawk4900]

This is an older model where the probe is conveniently right at the front at the access panel. See my other reply

 

[nighthawk4900]

Maybe you can install the sensor in a more convenient place?

What if you left the old sensor in place and just installed a new sensor in the inlet pipe?

Note that there might be issues with this approach, so I am not recommending it; I am just suggesting something to consider.

Honestly not a bad idea for the future.. it really was just a hole in the pvc with the sensor held down with an adjustable hose.

 

[nighthawk4900]

Got it done with some Moderate acrobatics and luck.

Four screws around the edges of the top plastic panel allow for the whole top+fan to come off. Four screws around the electrical box inside the front access panel with allow that to also come off. With both of these freed up, and a few zip ties cut to allow for the wires inside to stretch enough, you can evicerate these out to the side, providing an area where there are no coils and you’re body can somewhat fit through.

The actual switch out was easy- open the hose clamp, pull out the old sensor, push in the new one, tighten down the clamp. Checked with water flow to make sure there was no leaking.

The old sensor wire is secured down in a few places with zip ties and it wasn’t worth it to cut all those out so I just left it hanging.

Threaded the new wire into the back of the electrical box through one of the holes, and then placed the whole thing back, fan and electrical box. Finally connected the two temp probe wires to the header at the very top in the panel, which is labeled temp sensor. Read online that it doesn’t matter which wire goes where.

It’s definitely a 2person job to be able to move both fan and electrical box at the same time due to the length constraints of the wires attached to both.

This picture shows the temp probe with the clamp on the inlet pipe.


7790 was the probe part number

I used this one from amazon and worked fine

https://a.co/d/dk66bVQ

 

[JamesW]

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