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Thread: Honeywell RLV430 ... Malfunction or error code?

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    Honeywell RLV430 ... Malfunction or error code?

    I have a Honeywell RLV430 thermostat. The temperature of the house is 64 yet I have my thermostat set to 69. Why? Because the self contained heater unit the thermostat it's attached to turns on for around one second then turns off. It then waits for a minute then repeats the cycle.
    Looking at the display, it at first appears normal. Then every once in an odd while, it flashes two numbers: 1.2 and 8.4.
    Any idea at all what's going on? Thank you.

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    Last edited by Ksr; 01-18-2019 at 11:13 AM.

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