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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Looking for the thermostat ((poolstat w/knob), part number

Customer Question

Looking for the thermostat ((poolstat w/knob), part number 15403 for a Anthony Citadell III pool heater, circa late 1980's Any ideas???
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: thermostat. Heater works fine except it does not shut off when desired temperature is met.
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: unit uses propane and is 380,000 BTU
Submitted: 21 days ago.
Category: HVAC
Expert:  Airheatman replied 21 days ago.

Do you have model on heater and have you tried

Expert:  Airheatman replied 21 days ago.

The only two places I am familiar with who sell parts for the heaters is and

Many of these are obsolete but if you can contact them they can probably recommend a replacement part.Let e know.

Customer: replied 21 days ago.
I am coming up with Teledyne Laars thermostat #RO318800 as a replacement do you concur
Expert:  Airheatman replied 21 days ago.

I do not have the model on your heater to verify.If you can call, they can verify. Take a look and see if this looks like your old one.