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rmauk's avatar
rmauk
Explorer
Nov 02, 2020

How do I run propane furnace but not hot water heater

Newbie here. Due to freezing temps, I want to run the furnace on low but with all water drained, but not winterized yet. How do I run the furnace but not the hot water tank?

20 Replies

  • Keep our furnace set at 35* all winter but still winterize.
  • You didn't answer if you drained your hot water heater. I'm suspecting you didn't. Keep that on as well if it's going to freeze for several days or drain it. You pull the plug - the anode rod - and let it drain to the outside. Look it up on YouTube.
  • WELCOME!!!


    Water heater.....has separate controls. Gas On/Off switch inside (could have electric also inside or in outside compartment)
    Brand/Model??

    Furnace.....controlled by Thermostat on wall
    Select HEAT
    Turn temp set point UP to desired temperature
    Fan comes on...slight delay/runs to purge combustion chamber then should hear 'Click, Click, Click' from ignitor/electrode then Flame comes on
    Heats to temp set point...flame goes out...fan runs for cool down cycle then repeats when room temp drops 2-3* below thermostat set point

    Brand/Model of Furnace and Thermostat would be helpful for us to help you

    Also should post Year/Brand/Model of RV
  • rmauk wrote:
    Newbie here. Due to freezing temps, I want to run the furnace on low but with all water drained, but not winterized yet. How do I run the furnace but not the hot water tank?
    Did you drain the water heater?
  • When you buy it ask during the walk thrugh. Easiest way is to turn off the switch. What kind of water heater is it?
  • Is your water heater and furnace separate appliances? What year, make and model is your TT?
  • Turn off the water heater at your control panel or wherever your water heater on off switch is.