Posted 19th June, 2026 at 10:29 by Matthew Varlow
The maximum working coolant pressure on a Webasto Thermo Pro 90 is 2.0 bar.
The permissable range is between 0.4 and 2.0 bar.
For full heater technical details please see Technical Library Link - https://www.butlertechnik.com/technical-library/thermo-pro-90
I hope this helps.
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