Thor 2017 Citation with Girard GSWH-2. Water pressure is at 40psi. Set water temp at 110 and do not turn on cold when using shower. Works great for us.. No problems with the temp. Called Girard and talked to tech guy (Redaldo) about a minor issue with temp sensor. Walked me thru problem on phone. Problem fixed. Had not use rv for several months and problem was air in lines. Sent me a new sensor no charge same day just in case the issue arose again (without air in lines) Great customer service. We have owned several motorhomes and so far I like the tankless water heater
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