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HVAC, Air Conditioners, Aqua Hot, Primus, Webasto, Chassis Heaters, Furnaces and Water Heaters Questions and information about the wide variety of Heating and Air Conditioning as well as Water Heater systems available are discussed here.

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  #1  
Old 11-07-2010
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Default No hot water in shower only, really weird, Other Water Issues (Moen)

We are getting water to the kitchen faucet when the cold water is turned on but nothing when we switch it to hot, getting only minimal water in hot or cold in the bathroom. The pump runs. It all seemed to work fine yesterday and today it's not. What should we be looking for? Still new to this bus (July '10) and need to fix this today as tomorrow we have to return to the job site and need water! Thanks in advance.
Kathy & Chuck
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  #2  
Old 11-07-2010
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Originally Posted by C&Knewbirds View Post
We are getting water to the kitchen faucet when the cold water is turned on but nothing when we switch it to hot, getting only minimal water in hot or cold in the bathroom. The pump runs. It all seemed to work fine yesterday and today it's not. What should we be looking for? Still new to this bus (July '10) and need to fix this today as tomorrow we have to return to the job site and need water! Thanks in advance.
Kathy & Chuck
Is the Fill Switch in the Off position?
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Old 11-07-2010
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Yes the fill switch is off.
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Old 11-07-2010
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Sounds like that pesky air purge valve used for Winterization.
toggle the air purge switch several times , could be on the side of the bed, or near the fresh water tank drain.
ALso behind the shower know trim plate there may be a balancing spool used for a non-scalding control, That is if you have a Moen shower faucet.
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Old 11-07-2010
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Originally Posted by Bill Pape View Post
Sounds like that pesky air purge valve used for Winterization.
toggle the air purge switch several times , could be on the side of the bed, or near the fresh water tank drain.
ALso behind the shower know trim plate there may be a balancing spool used for a non-scalding control, That is if you have a Moen shower faucet.
Would we need to start the bus to build up air pressure to do what you're suggesting? We haven't winterized as we are living in it but it has been in the 30s at night. Chuck said he knows where the switch is that you're talking about. Our shower faucet is not a Moen. Thanks. Kathy
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Old 11-07-2010
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Had same/similar problem (cold OK - no hot) after draining & refilling tank. Try cycling the fill switch several times. Good luck
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Old 11-07-2010
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Quote:
Originally Posted by Bill Pape View Post
Sounds like that pesky air purge valve used for Winterization.
toggle the air purge switch several times , could be on the side of the bed, or near the fresh water tank drain.
ALso behind the shower know trim plate there may be a balancing spool used for a non-scalding control, That is if you have a Moen shower faucet.
Okay, we toggled the air purge switch. We momentarily had good hot water and pressure in the bathroom sink but now no cold water/or pressure. Now there is no water at all in the bathroom sink. There is a fine black sediment coming out in the water. Kitchen sink is ok for cold water and pressure but no hot water or pressure. What does that tell us?
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Old 11-07-2010
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Had same/similar problem (cold OK - no hot) after draining & refilling tank. Try cycling the fill switch several times. Good luck
Thanks for the idea. Chuck said he tried that but we can always try it again!
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Old 11-07-2010
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Yep , Ya need Air

Sure sounds like the purge valve, It is a high quality brass valve, located at the hot water tank. Many have been cleaned and lubed with success. The gaskets are re-usable
Remove the two square ends, with four screws, clean, & lube with plumbers silicone grease. Several O rings, plunger & spring. There is also a few check valves in the system, but a little more difficult to access.
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Old 11-07-2010
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Hi Chuck & Kathy,

The valve that Bill calls the purge valve is actually a Versa Valve...the one that Chuck and I looked at back in July. A good cleaning and lubing with plumbers grease will fix it.

Try warming the Versa Valve with Kathy's hair dryer or a heat gun...maybe the lubricant is too cold to allow the spool to travel in the bore.
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