50-70 volts Dc

Dollarspa

Dollarspa

Active member
2 month ago I replace the 12 volt relay.

Sunday i'm working everything works okay for about 8 hours and than the burner stops working.

I use my voltmeter and it shows I have 50-70 volts dc fluctuates (bounces back and forth) going thru my thermostat, pressure switch and on and off switch and goes to relay. Burns relay out


20 horsepower Honda 12 volt
so I buy a couple of 12 volts relays it works but I'm guessing I'll be burning them up until I solve the excessive voltage.

anybody know the answer ?
 

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Y'all nailed that one..
but I explain..
Lowering the voltage to the relay-coil makes it "chatter on 'n' off. that kills 'em.
An intermittant (from loose-connection) charging system can cause the same effect,
and explains the voltage being high, instead of low.
A bad battery, or loose connection at the battery can cause similar affect.

there's more..
several mfr's use that 5-pin relay as a control for the 12 volt system..
it is run off the 24 volts DIRECTly off the charging coil (before the regulator,)
and tells the heater to shut down, IF the charging system isn't putting out (you know..voltage).
Girls are sometimes moody, and machines act like girls sometimes,
but the pre-described condition is actually a electrical failure.
Oh yeah..
the "before the regulator" wiring is actually quite stupid,
since the voltage regulator is USUALLY the weak-link.
..but the more sinsitive circuitry required to do it right,
is more expensive (so far,) than you'd pay for that particular safety.
We spend on beefier relays, beefier wiring, tighter controls, and all of that
which makes the all-important reliable relationship with your equipment.
 
Sirocco Jerry said:
Y'all nailed that one..
but I explain..
Lowering the voltage to the relay-coil makes it "chatter on 'n' off. that kills 'em.
An intermittant (from loose-connection) charging system can cause the same effect,
and explains the voltage being high, instead of low.
A bad battery, or loose connection at the battery can cause similar affect.

there's more..
several mfr's use that 5-pin relay as a control for the 12 volt system..
it is run off the 24 volts DIRECTly off the charging coil (before the regulator,)
and tells the heater to shut down, IF the charging system isn't putting out (you know..voltage).
Girls are sometimes moody, and machines act like girls sometimes,
but the pre-described condition is actually a electrical failure.
Oh yeah..
the "before the regulator" wiring is actually quite stupid,
since the voltage regulator is USUALLY the weak-link.
..but the more sinsitive circuitry required to do it right,
is more expensive (so far,) than you'd pay for that particular safety.
We spend on beefier relays, beefier wiring, tighter controls, and all of that
which makes the all-important reliable relationship with your equipment.
Click to expand...


Thanks Jerry I'll look at loose conections (because I already know their loose) I flip batteries back and forth using the skid as a charging station so I dont bother to tighten connections ..never thought that would be a problem because it recharges the batteries all night long. I use the batteries to run external lights on my surface cleaners kind of like off road lights ..so I dont clean shadows all night long.
 
David, I had a similar problem with my Hotsy a couple years ago, I kept on going through the relays.

I finally found out that the relays I was buying at O'Reilly auto parts is a 12 volt relay but the system needs a 24 volt relay. I could not find any anywhere so I got some from the Hotsy dealer and no problems since.

Your problem might be the same.
 
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