Bathroom heat

[ktloah]

We have an 04 Dynasty with the Aqua-hot 100-02S heating system. Everything's works fine but the bathroom register blows only cold air. All the other zones work fine. Am I missing a valve somewhere?  Thanks

[Ivylog]

Zones not working is often a stuck check valve at the pump. Tapping on it with the wooden handle if a hammer will usually loosen/fix it. Getting the cover off to get to it takes longer than the fix although it could be a bad pump.

Before pulling the cover, make sure all 3 zones are on furnace and the temp settings are high enough.

[Ivan K]

Sounds like our type of AH and the check valves should be above the cover. Unless the pump is not running, Dick's fix should do it for you.

[ktloah]

Ok, thank you....will check that out. So, there are 3 zones which mean 3 pumps. I assume the check valves are close to the pump themselves?

Thanks Ivan, you answered my question on where the check valves are...

[Ivylog]

Actually you have 4… the basement one is on an adjustable Tstat in the ceiling of the water bay.

[ktloah]

Thankyou

[Dr4Film]

Ronnie, look at the photo posted previously and you will see the fourth pump mounted below the upper three and it is turned vertical.

[waterskier_1]

Many coaches use the basement heat loop for the bathroom.  Often there is a separate fan switch to turn on/off also.  If your is this way, make sure the basement thermostat is set to chime on, and then that the applicable pump is running, and the check valve isn't stuck.