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Old 11-27-2003, 06:31 PM
Registered User
Join Date: Jan 2003
Location: Chehalis , Wa
Posts: 14
Question Heater Mono Valve clicks...

I Recently purchased, a 1981 Euro 280SE 6 cyl, manual trans, Whata fun car....The mono valve Which actually seems to have two solenoid bodies..makes a soft clicking noise about once
every 4 seconds whenever the engine is running or the
key just in the ignition on position, BUT only after the engine is up to operating temp...Heater seems to function OK... Anyone familiar with this....

Thanks in advance....

Ron C.
'81 280SE
'70 280SE
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Old 11-27-2003, 11:41 PM
pberku's Avatar
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Join Date: Oct 2003
Location: Montreal, Canada
Posts: 737
This is a normal function of your climate control system when its trying to maintain your pre-set cabin temperature.

When the system calls for heat, it will cycle the MonoValve ON and OFF every few seconds.

There is nothing wrong. All is well.


Last edited by pberku; 11-28-2003 at 01:08 AM.
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